abstain vs go after

abstain

verb
  • Deliberately refrain from casting one's vote at a meeting where one is present. 

  • Refrain from (something or doing something); keep from doing, especially an indulgence. 

go after

verb
  • To pursue in attempt to catch another. 

  • To pursue an object or a goal. 

How often have the words abstain and go after occurred in a corpus of books? (source: Google Ngram Viewer )