Citation impact
Citation impact, also known as citation metric, is a measure of how often an academic article, journal, book, author, or institution is cited. Citation count is a raw score equal to the number of citations received (considered in a given citation index) while citation frequency or citation rate is a normalized value given by the ratio of citation counts to number articles published by the journal or author group during a given time period; for example, 5 citations received by 10 articles would result in a citation frequency of 0.5=5/10.