cachinnate vs ululate

cachinnate

verb
  • To laugh loudly, immoderately, or too often. 

ululate

verb
  • to howl loudly or prolongedly in lamentation or joy 

  • to produce a rapid and prolonged series of sharp noises with one's voice. 

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