droplets vs sprayer

droplets

sprayer

noun
  • A device, machine or vehicle used for spraying, where sprayers are commonly used for projection of water, weed killers, crop performance materials, pest maintenance chemicals, as well as manufacturing and production line ingredients. 

  • An object used for spraying, such as a spray bottle. 

  • One who sprays. 

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