fulfill vs go through with

fulfill

verb
  • To satisfy, carry out, bring to completion (an obligation, a requirement, etc.). 

  • To emotionally or artistically satisfy; to develop one's gifts to the fullest. 

  • To package, distribute, or ship goods. 

  • To obey, follow, comply with (a rule, requirement etc.). 

go through with

verb
  • To carry out (something planned or promised); to proceed with or continue with. 

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