fill in vs kick someone's ass

fill in

verb
  • To beat up; to physically assault. 

  • To substitute for somebody or something. 

  • To complete a form or questionnaire with requested information. 

  • To fill; to replace material that is absent or has been removed. 

  • To inform somebody, especially to supply someone missing or missed information. 

kick someone's ass

verb
  • To clobber someone; to beat someone severely. 

  • To actually kick someone in the buttocks. 

How often have the words fill in and kick someone's ass occurred in a corpus of books? (source: Google Ngram Viewer )