sprayer vs waterer

sprayer

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

  • 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. 

  • One who sprays. 

waterer

noun
  • A device used for watering. 

  • A device from which livestock, poultry, or pets may drink. 

  • One who waters plants. 

  • One who waters down, or dilutes, something. 

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