casting vs erection

casting

noun
  • The act or process of selecting actors, singers, dancers, models, etc. 

  • Of hounds, the act of spreading out and searching for a scent. 

  • An object made in a mold. 

  • The regurgitation of fur, feathers, and other undigestible material by hawks, to clean and empty their crops.^([W]) 

  • The excreta of an earthworm or similar creature. 

  • A manufacturing process using a mold. 

  • The act of converting between data types. 

erection

noun
  • The act of building or putting up or together of something. 

  • The state or quality of being erect from engorgement with blood. 

  • A penis or clitoris that is erect. 

  • The physiological process by which erectile tissue, such as a penis or clitoris, becomes erect by being engorged with blood. 

  • Formal approval and official establishment of an institution such as a society or a monastery by higher church authorities. 

  • Anything erected or built. 

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