airspeed indicator vs tattler

airspeed indicator

noun
  • An instrument that displays an aircraft's current airspeed. 

tattler

noun
  • A device fitted to a vehicle to measure mileage etc. 

  • Either of two similar bird species in the shorebird genus Heteroscelus (Tringa in some taxonomies). 

  • One who tattles (notifies authorities of illicit behavior) or is inclined to do so; a tattletale. 

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