skiving vs truanting

skiving

noun
  • A piece made in skiving (paring or splitting) leather, especially the part from the inner, or flesh, side. 

  • A type of machining that skives metal, with various applications including gear cutting. 

truanting

noun
  • Truancy. 

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