waiting time が一番シンプルで分かりやすいと思います。
単に"wait"だけでも文脈によっては「待ち時間」の意味になると思いますけども。
例： How long is the wait?（待ち時間どれくらい？）
案内の表記には以下をご参考になさってください。
Current waiting time is XX minutes.
We apologize for the wait of XX minutes.
（私たちはXX分の待ち時間について謝罪します）という表現を追加すると、お客様への敬意を示す効果もあります。これは特にピーク時に役立ちます。
"The queue time is approximately 10 minutes."
"The time before being served is about 20 minutes."
"The estimated waiting time before being served is 8 minutes."
Waiting time is simply explains as "Waiting time."
If you are waiting in a queue such as for a ride at a park you can explain it as "Queuing time."
Waiting time is simply explains as "Waiting time."
Waiting time＝待ち時間。
If you are waiting in a queue such as for a ride at a park you can explain it as "Queuing time."
Queuing time＝待ち時間。Waiting in a queue→公園で乗り物の順番待ちなどのことをQueuing timeと言う。
saying "the waiting time is 20 minutes"is a casual way to describe this.
saying "the time before being served is 20 minutes" is a slightly more formal way to describe this but either of these answers should suffice
we have an average waiting time of (number of minutes).
queuing time is (number of minutes).
average waiting time (number of minutes).
examples
"We have an average of a 15-minute wait today".
or
"we have a queue time of 20mins today".
or
"the average time you will have to wait is 30 mins today".
you could shorten this to
"we have a waiting time today" or "queue time is 20 mins"
thank you for your patience is a good polite introduction,
example
"thank you for your patience, we have a
queue time of 30 mins today"
例
"We have an average of a 15-minute wait today".
（今日は待ち時間１５分です。）
あるいは
"we have a queue time of 20mins today".
（今日は２０分待ちです。）
または、
"the average time you will have to wait is 30 mins today".
（本日待ち時間は３０分です）
これを短くすることができます。
"we have a waiting time today"
（今日はお待ちいただきます）
あるいは
"queue time is 20 mins"
（２０分の行列です。）
"thank you for your patience"
はよい、丁寧な導入文です。
例
"thank you for your patience, we have a
queue time of 30 mins today"
（お待ちいただき申し訳ございません。本日は３０分待ちです。）
* Waiting time/waiting period- At a busy restaurant customers might have to wait longer for their food order to be ready. At an amusement park people take turns to go on rides, if there are many people then they will have to wait longer to take a ride.
Example Sentences:
Joe's takeaway had to put a sign "Waiting period 10 minutes. Sorry for any inconvenience caused".
Please be advised, at times you might have to wait longer to take a ride.
* Waiting time/waiting period（待ち時間）
- 忙しい、人気のあるレストランではお客さんは長い時間、注文が出来るのを待たなくてはいけませんよね。
アミューズメントパークでは、順番に乗り物にのるので、多くの人が並んでいたらライドに乗るのに長い時間待たなくてはいけません。
【例文】
Joe's takeaway had to put a sign "Waiting period 10 minutes. Sorry for any inconvenience caused"
（ジョーのお持ち帰りが出来る店では『10分待ちです。迷惑をお掛けしてもうしわけありません』とサインを出さなければなりませんでした）
Please be advised, at times you might have to wait longer to take a ride.
（少しお待ちいただくことがございますことをお知らせいたします）
This time allotted before one in served for a particular service is called a queue. Typically an establishment will make the waiting environment suitable for the service. In amusement parks, persons will wait in a line. In a restaurant, the persons will wait at the dining table with a refreshment. The wait time before being served allows for the persons that are serving to prepare the service for the client or person. For example, at a restaurant, the food is prepared based on the order given and then it is served.
I am assuming that this refers to the amount of time that people have to wait for a meal, ride, etc
Approximate waiting time - _____ minutes
There is not enough information given for me to completely understand the scenario, but I am taking it that it is about how long someone has to wait for a table at a restaurant, ride in an amusement park, etc.
A sign in a restaurant might say, "Waiting time - approximately 10 minutes. Thank you for your patience"
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