gowk vs ibex

gowk

noun
  • A cuckoo. 

  • An apple core. 

  • A fool. 

verb
  • To make foolish; to stupefy. 

ibex

noun
  • An imaginary creature with serrated horns, somewhat similar to the heraldic antelope. 

  • A type of wild mountain goat of the genus Capra, such as the species Capra ibex. 

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