This is the 4999th most frequent Japanese word.
総数
Total number.
総数 is used here to indicate the total quantity or number of a defined group, in this case, the students of a school.
学校の生徒総数は千人を超えています。
The total number of students at the school exceeds a thousand.
総数 is used to refer to the overall count or summation in a certain context, in this case, the customers of shops.
総数で見れば、この店舗が一番来客が多いです。
If you look at the total number, this shop has the most customers.
総数 here is used to signify the complete count or number of items in a particular category, in this case, doctors of a country.