goggle vs keep an eye out

goggle

verb
  • To stare (at something) with wide eyes. 

  • To roll the eyes. 

noun
  • A wide-eyed stare or affected rolling of the eye. 

  • A pair of protective eyeglasses. 

keep an eye out

verb
  • To watch for or look out for. 

How often have the words goggle and keep an eye out occurred in a corpus of books? (source: Google Ngram Viewer )