wail vs weeper

wail

noun
  • A prolonged cry, usually high-pitched, especially as of grief or anguish. 

  • A sound made by emergency vehicle sirens, contrasted with "yelp" which is higher-pitched and faster. 

  • Any similar sound as of lamentation; a howl. 

verb
  • To lament; to bewail; to grieve over. 

  • To make a noise like mourning or crying. 

  • To weep, lament persistently or bitterly. 

  • To cry out, as in sorrow or anguish. 

  • To perform with great liveliness and force. 

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 wail and weeper occurred in a corpus of books? (source: Google Ngram Viewer )