howl vs weeper

howl

noun
  • A prolonged cry of distress or anguish; a wail. 

  • Any similar sound. 

  • The protracted, mournful cry of a dog, wolf or other canid; also of other animals. 

verb
  • To make a noise resembling the cry of a wild beast. 

  • To utter a loud, protracted, mournful sound or cry, as dogs and wolves often do. 

  • To utter a sound expressive of pain or distress; to cry aloud and mournfully; to lament; to wail. 

  • To utter with outcry. 

weeper

noun
  • A pleurant. 

  • A weeping tree. 

  • A white border round the sleeve of a mourning dress. 

  • A widow's crape veil. 

  • A hired mourner. 

  • A thing that slowly leaks liquid. 

  • A person who weeps. 

  • A crape hatband. 

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