low-pitched vs soprano

low-pitched

adj
  • Of a sound, having a comparatively low pitch. 

soprano

noun
  • Musical part or section higher in pitch than alto and other sections. 

  • Person or instrument that performs the soprano part. 

verb
  • To sing or utter with high pitch. 

How often have the words low-pitched and soprano occurred in a corpus of books? (source: Google Ngram Viewer )