labeling vs notation

labeling

noun
  • A set of labels applied to the various objects in a system. 

  • The introduction of a traceable chemical group (e.g., containing an isotope or a fluorescent dye) into a protein or other biomolecule of interest so it can be tracked or quantified during experimental analysis. 

notation

noun
  • A system of characters, symbols, or abbreviated expressions used in an art or science or in mathematics or logic to express technical facts or quantities. 

  • This section lists all algebraic notation used in this book. (Using notations would be incorrect). 

  • The act, process, method, or an instance of representing by a system or set of marks, signs, figures, or characters. 

  • A specific note or piece of information written in such a notation. 

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