airspace vs mist

airspace

noun
  • The portion of an enclosed area which contains air, especially breathable air. 

  • that part of the sky designated for the sole use of aircraft. 

  • The cavity in a cavity wall containing air for insulation. 

  • Space (i.e. a few neighboring frequencies) available for broadcasting within a particular frequency band. 

  • A specified portion of the atmosphere, especially that under the technical aviation control and/or jurisdiction of a particular state over which territory (and territorial waters) it lies. 

mist

noun
  • Water or other liquid finely suspended in air. (Compare fog, haze.) 

  • It was difficult to see through the morning mist. 

  • Anything that dims, darkens, or hinders vision. 

  • A layer of fine droplets or particles. 

verb
  • To form mist. 

  • To be covered by tears. 

  • To spray fine droplets on, particularly of water. 

  • To cover with a mist. 

  • To disperse into a mist, accompanying operation of equipment at high speeds. 

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