come at vs work on

come at

verb
  • To get to, especially with effort or difficulty. 

  • To attack; to harass. 

  • To accept (a situation); to agree to do; to try. 

work on

verb
  • To shape, form or improve something. 

  • To exercise influence on someone. 

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