apologize vs moan

apologize

verb
  • To make an apology or excuse; to acknowledge some fault or offense, with expression of regret for it, by way of amends 

  • To express regret that a certain event has occurred. 

moan

verb
  • To complain; to grumble. 

  • To say in a moan, or with a moaning voice. 

  • To grieve. 

  • To make a moan or similar sound. 

noun
  • a low, mournful cry of pain, sorrow or pleasure 

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