calculus vs trigonometry

calculus

noun
  • Differential calculus and integral calculus considered as a single subject; analysis. 

  • Deposits of calcium phosphate salts on teeth. 

  • Any formal system in which symbolic expressions are manipulated according to fixed rules. 

  • A stony concretion that forms in a bodily organ. 

  • A decision-making method, especially one appropriate for a specialised realm. 

trigonometry

noun
  • The branch of mathematics that deals with the relationships between the sides and angles of (in particular) right-angled triangles, as represented by the trigonometric functions, and with calculations based on said relationships. 

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