How many times a year does it snow a lot in your town?
How often in a year does it snow in your area?
街 - town, area
あなたの街 - your area, your town
年に何回 - how many times in a year
1年は1 yearけれど”a year”でも大丈夫です。
大雪 - heavy snow, snow a lot
Snow a lotとheavy snowの違いは
snow a lot - いっぱい降ってる
Heavy snow - 大雪
Heavy snowだったら”fall”も必要。heavy snow fall
How many times a year does it snow a lot in your town?
How many times a year does heavy snow fall in your town?
How often does heavy snow fall in your area?
イギリス 
