look-in vs opportune occasion

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 occasion

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