Sorry if this is trivial, but I can not find anything online nor seem to get it to work myself. I have a data set made of 2 waves that I have combined. The variable "survey" denotes if the observation is from the first (=1) or the second wave (=2).

How do I do a simple count within the survey variable to check if the number of observations of the first wave (1) are roughly equal to those in the second wave (2)?