chute vs log flume

chute

noun
  • A framework, trough, or tube, upon or through which objects are made to slide from a higher to a lower level, or through which water passes to a wheel. 

  • A waterfall or rapid. 

  • The pen in which an animal is confined before being released in a rodeo. 

  • A parachute. 

  • A spinnaker. 

verb
  • To parachute. 

log flume

noun
  • A flume specifically constructed to transport lumber and logs down mountainous terrain to a sawmill by using flowing water. 

  • An amusement park ride where passengers sit in a hollow log and travel along a track or circuit powered mostly by the flow of water. 

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