grub vs woodworm

grub

noun
  • An insect at an immature stage of its life cycle. 

  • Food. 

  • A dirty person. 

  • A despicable person; a lowlife. 

verb
  • To scavenge or in some way scrounge, typically for food. 

  • To dig; to dig up by the roots; to root out by digging; often followed by up. 

woodworm

noun
  • Anobium punctatum, the Common Furniture Beetle. 

  • Any of many beetle larvae that bore into wood. 

  • A shipworm, a worm-like mollusk in the family Teredinidae that feeds on wood underwater in saltwater. 

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