alto vs intonation

alto

noun
  • A person or musical instrument that performs the alto part. 

  • A musical part or section higher than tenor and lower than soprano, formerly the part that performed a countermelody above the tenor or main melody. 

  • An alto saxophone 

intonation

noun
  • A sound made by, or resembling that made by, a musical instrument. 

  • Emotive stress used to increase the power of delivery in speech. 

  • Reciting in a musical prolonged tone; intonating or singing of the opening phrase of a plain-chant, psalm, or canticle by a single voice, as of a priest. 

  • The rise and fall of the voice in speaking. 

  • Singing or playing in good tune or otherwise. 

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