Number Of Sheets
Number Of Flat Objects
noun
You have flat objects. You have a number of them. These flat objects are flat things, right? Flat things like sheets of paper, perhaps (or other sheets of things). So, this word is number of sheets.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
ステッカーの注文枚数は、百枚からです。
The minimum order quantity for stickers is one hundred.
今コウイチのサイフの中にあるクレジットカードの枚数を当ててみてください。
Can you guess how many credit cards Koichi has in his wallet at the moment?
折り紙の枚数を数えてもらえますか？
Could you count the number of origami papers?