grating vs scritch

grating

noun
  • The sound made by something that grates against something else. 

  • An optical system of close equidistant and parallel lines or bars, especially lines ruled on a polished surface, used for producing spectra by diffraction. 

  • The strong wooden lattice used to cover a hatch, admitting light and air; also, a movable lattice used for the flooring of boats. 

  • A barrier that has parallel or crossed bars blocking a passage but admitting air. 

  • A frame of iron bars to hold a fire. 

  • The loose material that comes from something being grated. 

adj
  • Harsh and unpleasant. 

  • Abrasive; tending to annoy. 

scritch

noun
  • A light scratching sound, like a small animal burrowing. 

  • The act of scratching an itch. 

verb
  • To scratch so as to relieve an itch or irritation. 

  • To make a light scratching sound, like a small animal burrowing. 

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