sled vs snowplow

sled

noun
  • A vehicle on runners, used for conveying loads over the snow or ice. (contrast "sleigh", which is larger) 

  • A small, light vehicle with runners, used recreationally, mostly by children, for sliding down snow-covered hills. (A "sled" in this sense is not pulled by an animal as a "sleigh" is.) 

  • A snowmobile. 

verb
  • To ride a sled. 

  • To convey on a sled. 

snowplow

noun
  • A device attached to a vehicle to enable it to be used for removing snow. 

  • A maneuver in which the tips of the skis or skates point inwards and the back ends point outwards. 

  • A motorized vehicle that is used to push snow off flat surfaces such as roads and parking lots. 

verb
  • To perform a snowplow in skiing. 

  • To clear (roads, etc) using a snowplow. 

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