calender vs specialize

calender

verb
  • To press between rollers for the purpose of making smooth and glossy, or wavy, as woolen and silk stuffs, linens, paper etc., as in a calender. 

noun
  • A machine, used for the purpose of giving cloth, paper etc., a smooth, even, and glossy or glazed surface, by cold or hot pressure, or for watering them and giving them a wavy appearance; it consists of two or more cylinders revolving nearly in contact, with the necessary apparatus for moving and regulating. 

  • One who pursues the business of calendering. 

  • One of a wandering, mendicant Sufic order of fantastically dressed or painted dervishes, founded in the 13th century by an Arab named Yusuf. 

specialize

verb
  • To become distinct or separate from what is common 

  • To focus one's study upon a particular skill, field, topic, or genre. 

  • To make distinct or separate due to form or function. 

  • To narrow in scope. 

  • To be known or notorious for some specialty. 

  • To specify: to mention specifically. 

  • To focus one's business upon a particular item or service. 

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