clarification vs continuation

clarification

noun
  • The act of freeing from obscurities. 

  • The act of clarifying; the act or process of making clear or transparent by freeing visible impurities; particularly, the clearing or fining of liquid substances from feculent matter by the separation of the insoluble particles which prevent the liquid from being transparent. 

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 

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