bemoan vs bewail

bemoan

verb
  • To moan or complain about (something). 

  • To be dismayed or worried about (someone), particularly because of their situation or what has happened to them. 

bewail

verb
  • To wail over; to feel or express deep sorrow for 

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