clever vs heads up

clever

adj
  • Mentally quick and resourceful. 

  • Skilled at achieving what one wants, especially via unusual methods. 

  • Nimble with hands or body; skillful; adept. 

  • Showing inventiveness or originality; witty. 

  • Possessing magical abilities. 

  • Smart, intelligent, or witty; mentally quick or sharp. 

  • Quick to understand, learn, and devise or apply ideas; intelligent. 

  • Fit and healthy; free from fatigue or illness. 

heads up

adj
  • Containing only two players. 

intj
  • Used as an informal warning, caution, or call for attention; pay attention! 

How often have the words clever and heads up occurred in a corpus of books? (source: Google Ngram Viewer )