look at vs make eyes

look at

verb
  • to face (to be presented or confronted with; to have in prospect) 

  • To consider. 

  • To observe or watch (something). 

  • To study (something) visually. 

make eyes

verb
  • To flirt with (someone) by making obvious glances. 

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