data vs lemma

data

noun
  • A representation of facts or ideas in a formalized manner capable of being communicated or manipulated by some process. 

  • Information, especially in a scientific or computational context, or with the implication that it is organized. 

  • Recorded observations that are usually presented in a structured format. 

lemma

noun
  • The theoretical abstract conceptual form of a word, representing a specific meaning, before the creation of a specific phonological form as the sounds of a lexeme, which may find representation in a specific written form as a dictionary or lexicographic word. 

  • The outer shell of a fruit or similar body. 

  • One of the specialized bracts around the floret in grasses. 

  • The canonical form of an inflected word; i.e., the form usually found as the headword in a dictionary, such as the nominative singular of a noun, the bare infinitive of a verb, etc. 

  • A proposition proved or accepted for immediate use in the proof of some other proposition. 

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