clear one's throat vs whoop

clear one's throat

verb
  • Forcibly, sometimes mutedly, expelling air from one's lungs, sometimes to clear mucus, sometimes to attract attention to something; less vigorous than coughing. 

whoop

verb
  • To cough or breathe with a sonorous inspiration, as in whooping cough. 

  • To make a whoop. 

  • To shout, to yell. 

  • To beat, to strike. 

  • To defeat thoroughly. 

noun
  • A bump on a racetrack. 

  • A loud, eager cry, usually of joy. 

  • A gasp, characteristic of whooping cough. 

How often have the words clear one's throat and whoop occurred in a corpus of books? (source: Google Ngram Viewer )