Other meaning of 一顿 besides relating to meals I have the following sentence:
老师把学生批评了一顿
Google's only translation of 一顿 on its own returns 'A meal' or 'a spanking' which is the meaning discussed in other posts.
Here it seems like it means a little bit, or slightly, but can anyone offer a clearer picture?
For references, I took it from Peking Uni Youtube class for HSK5 (5:22)
In Taiwan, according to dictionary owned by Ministry of Education.
一頓 means:

表示數量，一次、一回。

(Denote quantity, one session.)