continuation vs parenthesis

continuation

noun
  • That which extends, increases, supplements, or carries on. 

  • A representation of an execution state of a program at a certain point in time, which may be used at a later time to resume the execution of the program from that point. 

  • A successful shot that, despite a foul, is made with a single continuous motion beginning before the foul, and that is therefore valid in certain forms of basketball. 

  • The act or state of continuing or being continued; uninterrupted extension or succession 

parenthesis

noun
  • A clause, phrase or word which is inserted (usually for explanation or amplification) into a passage which is already grammatically complete, and usually marked off with brackets, commas or dashes. 

  • Such brackets as used to clarify expressions by grouping those terms affected by a common operator, or to enclose the components of a vector or the elements of a matrix. 

  • Either of a pair of brackets, especially round brackets, ( and ) (used to enclose parenthetical material in a text). 

  • A digression; the use of such digressions. 

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