leechlike vs parasitic

leechlike

adj
  • Resembling or characteristic of a leech, especially in being clinging or parasitic. 

parasitic

adj
  • Of or pertaining to a biological or symbolic parasite. 

  • Drawing upon another organism for sustenance. 

  • Exploiting another for personal gain. 

  • Of emotional damages: accompanying a physical or pecuniary injury. 

noun
  • A component of a circuit that does not show up in a circuit's schematic but does show up in the circuit's behavior. 

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