家にいる時間は少ないって英語でなんて言うの？

The phrase "almost always" means a lot of the time. This sentence states that you are almost never at home because you are so busy. You can elaborate and explain your work schedule and that you go out. I hope that this helps :)

All of these sentences express that someone feels like they are never home because they are always out doing something, whether it be work or going out to do recreational activities.

If you have not been at your home much in the past few days or weeks you can use the phrase "I have been out of the house a lot recently". This tells the listener that you have been busy and so not at home much. "I have not spent much time at home due to work and my social life" - This tells someone the reason why you have not been at home much. When people have busy schedules it is difficult to find the time to spend at home either with your family or just relaxing. Social life with your friends or work can be a cause of not being at home much.

If you don't spend much time in a certain place you can use the preposition of time 'rarely' to indicate the scarcity of your appearances: "I'm rarely in London these days as my main residence is in Paris."

If you are busy or have a busy life working/going out at weekends and are hardly ever (not very often) at home then you can simply say 'I'm not at home much' you can add 'as I'm always busy' to describe why

I'm mainly home on weekends. - this informs the person when you are more likely to be seen at home. I don't spend much time at home during the week, but weekends I'm there. - Here you are saying your not there during the week, but on weekends you normally are there.

"Out and about" means anywhere other than your home. If you "rarely" do something it is a very infrequent activity. To "spend your time" is a casual way to explain how you use time. You can spend to much time at the gym. You can spend a lot of time reading.