プログレッシブ和英中辞典(第4版)の解説
あたまかず【頭数】
the number of persons ⇒にんずう(人数)
頭数を数える
count 「the number of persons [heads]
頭数を増す[減らす]
increase [decrease] the number
もし鈴木君が来ないとチームの頭数がそろわなくなる
If Suzuki doesn't come, we won't have enough players to make up a team.
頭数が2名足りない
We are two men short of the required number.
とうすう【頭数】
the number of heads
羊の頭数を数える
count sheep