piddling vs useless as tits on a boar hog

piddling

adj

  • Insignificant, negligible, paltry, trivial, useless. 

useless as tits on a boar hog

adj

  • Ineffectual, pointless. 

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