first name vs hypocoristic

first name

noun

  • The first element of a full name in cultures that place the given name first. 

hypocoristic

noun

  • A nickname, especially one indicating intimacy and formed through a shortening of the original name. 

adj

  • Relating to a nickname, usually indicating intimacy with the person. 

  • Relating to baby talk. 

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