propulsion vs tossing

propulsion

noun
  • The action of driving or pushing, typically forward or onward; a propulsive force or impulse. 

tossing

noun
  • The motion of something that tosses; a throwing or sudden rising and falling. 

  • The process of washing ores by violent agitation in water, in order to separate the lighter or earthy particles; tozing. 

  • A process for refining tin by dropping it through the air while melted. 

adj
  • Used to disparage or curse someone or something. 

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