There are several ways to do this. Journal Citation Reports will include this information, as will http://www.scimagojr.com/ Addtionally, you can search in Pubmed by Journal name and use the results by year graph on the right hand side bar.
Daer Anubhav follows this WOS webpage link https://www.webofscience.com/wos/alldb/basic-search and gets fast results to search the number of publications in the given period of time. or you can use SciFinder