LDOCE(Longman Dictionary Of Contemporary English) onlineでもintakeのところにこういう記載があった。
2 [uncountable and countable] the number of people who join a school, profession etc at a particular time
intake of an intake of around 120 students each year
Cambridge Dictionaries Online のCambridge Advanced Learner's Dictionaryでは
intake (NUMBER OF PEOPLE) noun
[U] the number of people that are accepted at a particular time by an organization, especially a college or university:
The teacher-training college has increased its intake of students by 50% this year.
同じ時期に入る人々の数、ってことは、We are within the same intake of 2007. とか言うのだろうか。気分的にはHe is my same intake of this company.とか言いたいような気がするけど。