look-in vs opportune moment

look-in

noun
  • A quick glance. 

  • A chance to participate, compete, or succeed. 

  • A brief visit. 

  • A quick short pass to a receiver running diagonally toward the center of the field. 

opportune moment

How often have the words look-in and opportune moment occurred in a corpus of books? (source: Google Ngram Viewer )