500 MOST FREQUENT ENGLISH WORDS
https://summerboardingcourses.com/blogs/500-most-common-words-in-english/
https://www.sketchengine.eu/wp-content/uploads/word-list/english/english-word-list-total.pdf
https://world-english.org/english500.htm
https://eslcomputerlab.weebly.com/uploads/2/1/8/9/21891552/500mostcommonwordsinenglish.pdf
https://www.smart-words.org/500-most-commonly-used-english-words.html
http://sutir.sut.ac.th:8080/sutir/bitstream/123456789/3471/1/Fulltext.pdf