sparkler vs sprinkler head

sparkler

noun
  • A hand-held firework that emits sparks. 

  • A gem or ornament that sparkles. 

  • A sparkling wine. 

  • A tiger beetle. 

  • Anything that sparkles. 

  • A vivacious and charismatic person. 

sprinkler head

noun
  • A heat-activated device that sprays water in the event of a fire, usually mounted on a ceiling. 

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