deer fly vs mischief

deer fly

noun
  • A Eurasian species of louse fly in the family Hippoboscidae, Lipoptena cervi; parasites of elk, deer and other bovine animals, sucking blood and laying eggs in the fur of the host animals. 

  • A gold- or green-eyed horsefly of the genus Chrysops in the family Tabanidae; pests to cattle, horses and humans, feeding on their blood. 

mischief

noun
  • A group or a pack of rats. 

  • Casual and/or flirtatious sexual acts. 

  • A playfully annoying action. 

  • A criminal offence defined in various ways in various jurisdictions, sometimes including causing damage to another's property. 

  • Conduct that playfully causes petty annoyance. 

  • The Devil; used as an expletive. 

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