cheep vs vowel

cheep

noun
  • A similar-sounding short high-pitched sound 

  • A short, high-pitched sound made by a small bird. 

verb
  • To express in a chirping tone. 

  • Of a small bird, to make short, high-pitched sounds. 

intj
  • The short, high-pitched sound made by a small bird. 

vowel

noun
  • A sound produced by the vocal cords with relatively little restriction of the oral cavity, forming the prominent sound of a syllable. 

  • A letter representing the sound of vowel; in English, the vowels are a, e, i, o, u, and y. 

verb
  • To add vowel points to a consonantal script (e.g. niqqud in Hebrew or harakat in Arabic). 

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