vocalization vs vowel

vocalization

noun
  • The change in pronunciation of historically or variably consonant (typically sonorant) sounds as vowels. For example, the syllabic /l/ in words like people or the coda one in words like cold or coal are variably realized as a high back vowel or glide—[ʊ], [u], [ɤ] or [o]—in many dialects of English in the US, UK, and the Southern Hemisphere. For example, in African American Vernacular English, one common pronunciation of the words "people", "cold", and "coal" is [pʰipʊ], [kʰoɤd], or [kʰoɤ] respectively. 

  • The production of musical sounds using the voice, especially as an exercise 

  • The act of vocalizing or something vocalized; a vocal utterance 

  • The addition of these diacritics and the respective phonemes to a word; the spoken form the word thereby receives. 

  • Any specific mode of utterance; pronunciation 

  • The use of speech to express an idea 

  • The vowel diacritics in certain scripts, like Hebrew and Arabic, which are not normally written, but which are used in dictionaries, children's books, religious texts and textbooks for learners. 

vowel

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

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

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

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