go at vs shun

go at

verb
  • Used other than figuratively or idiomatically: see go, at. 

  • To try to solve a problem a specific way; to undertake a task. 

  • To initiate an attack on or an argument with. 

shun

verb
  • To screen, hide. 

  • To escape (a threatening evil, an unwelcome task etc). 

  • To avoid, especially persistently; ostracize. 

  • To shove, push. 

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