true bug vs worm

true bug

noun
  • Any of various insects of the order Hemiptera and in particular of the suborder Heteroptera, that are wingless or have two pairs of wings, and have mouthparts adapted for piercing and sucking. 

worm

noun
  • More loosely, any of various tubular invertebrates resembling annelids but not closely related to them, such as velvet worms, acorn worms, flatworms, or roundworms. 

  • Either a mythical "dragon" (especially wingless), a gigantic sea serpent, or a creature that resembles a Mongolian death worm. 

  • A strip of linked tiles sharing parallel edges in a tiling. 

  • The condensing tube of a still, often curved and wound to save space. 

  • The spiral wire of a corkscrew. 

  • Anything helical, especially the thread of a screw. 

  • A self-replicating program that propagates through a network. 

  • A short revolving screw whose threads drive, or are driven by, a worm wheel or rack by gearing into its teeth. 

  • A graphical representation of the total runs scored in an innings. 

  • A spiral instrument or screw, often like a double corkscrew, used for drawing balls from firearms. 

  • An internal tormentor; something that gnaws or afflicts one’s mind with remorse. 

  • The lytta. 

  • A contemptible or devious being. 

  • A dance, or dance move, in which the dancer lies on the floor and undulates the body horizontally thereby moving forwards. 

  • A muscular band in the tongue of some animals, such as dogs; the lytta. 

  • A generally tubular invertebrate of the annelid phylum; an earthworm. 

verb
  • To work one's way by artful or devious means. 

  • To fill in the contlines of (a rope) before parcelling and serving. 

  • To drag out of, to get information that someone is reluctant or unwilling to give (through artful or devious means or by pleading or asking repeatedly). 

  • To clean by means of a worm; to draw a wad or cartridge from, as a firearm. 

  • To cut the worm, or lytta, from under the tongue of (a dog, etc.) for the purpose of checking a disposition to gnaw, and formerly supposed to guard against canine madness. 

  • To move with one's body dragging the ground. 

  • To make (one's way) with a crawling motion. 

  • To effect, remove, drive, draw, or the like, by slow and secret means. 

  • To work (one's way or oneself) (into) gradually or slowly; to insinuate. 

  • To deworm (an animal). 

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