piece of ass vs sex bomb

piece of ass

noun
  • A very attractive woman, when considered as a sex object. 

  • An act of intercourse, especially a one-night stand. 

  • A male prostitute. 

sex bomb

noun
  • Someone who is highly physically attractive; a bombshell. 

How often have the words piece of ass and sex bomb occurred in a corpus of books? (source: Google Ngram Viewer )