unproductive vs useless as tits on a boar hog

unproductive

adj

  • Not productive; useless; fruitless. 

  • No longer used to produce new words (see examples). 

useless as tits on a boar hog

adj

  • Ineffectual, pointless. 

How often have the words unproductive and useless as tits on a boar hog occurred in a corpus of books? (source: Google Ngram Viewer )