love-shy vs sexually frustrated

love-shy

adj
  • Ineffectual at courtship or attaining sexual intercourse. 

noun
  • A person, especially a man, who is ineffectual at courtship. 

sexually frustrated

adj
  • agitated by a lack of desired sexual outlet 

How often have the words love-shy and sexually frustrated occurred in a corpus of books? (source: Google Ngram Viewer )