Abstract: Language is always in a state of constant movement.Since the 21st century,with the development of society,a large number of new words have been produced.These new words present complex and changeable linguistic phenomena in their dynamic development and change.This paper collects and sorts out the list of new words,and combines it with the data of high-frequency words in language monitoring,and obtains 173 high-frequency new words from 2000 to 2020.Through dynamic observation,description and analysis,it draws the development and change track of diachronic word frequency,and explores the development and change of high-frequency new words.

Key words: high frequency neologisms, dynamic, word frequency, development curve