lament vs weeper

lament

noun
  • An expression of grief, suffering, sadness or regret. 

  • A song expressing grief. 

verb
  • To express grief; to weep or wail; to mourn. 

  • To feel great sorrow or regret; to bewail. 

weeper

noun
  • A person who weeps. 

  • A weeping tree. 

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

  • A pleurant. 

  • A widow's crape veil. 

  • A hired mourner. 

  • A thing that slowly leaks liquid. 

  • A crape hatband. 

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