ordo vs subclass

ordo

noun
  • A category in the classification of organisms, ranking below classis and above familia. 

  • A calendar which prescribes the Mass and office which is to be celebrated each day. 

  • A musical phrase constructed from one or more statements of one modal pattern and ending in a rest. 

  • an established civil body or corporation with a hierarchy 

subclass

noun
  • A rank directly below class. 

  • A secondary class within a main class. 

  • An object class derived from another class (its superclass) from which it inherits a base set of properties and methods. 

verb
  • To cause (an object) to act as an instance of a subclass (by creating the desired subclass and instantiating an object of this subclass). 

  • (in object-oriented programming) To create a subclass of (some class). 

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