clear one's throat vs hork

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. 

hork

verb
  • To vomit, cough up. 

  • To eat hastily or greedily; to gobble. 

  • To foul up; to be occupied with difficulty, tangle, or unpleasantness; to be broken. 

  • To move. 

  • To throw. 

  • To steal, especially petty theft or misnomer in jest. 

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