accentuation vs emphasis

accentuation

noun
  • Act of accentuating; applications of accent. 

  • Pitch or modulation of the voice in reciting portions of the liturgy. 

emphasis

noun
  • Prominence given to a syllable or words, by raising the voice or printing in italic or underlined type. 

  • Special attention or prominence given to something. 

  • The phonetic or phonological feature that distinguishes emphatic consonants from other consonants. 

  • Special weight or forcefulness given to something considered important. 

  • The use of boldface, italics, or other such formatting to highlight text. 

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