I appreciate the fact that it contains shortcuts for such words as "endeavour" (EDV), "ecclesiastic" (EC), "notwithstanding" (NWG) or "vehemence" (VMC) being a dictionary of the "basic and most frequently used words". Also, the suggested abbreviation for "sex" is "SEX".
Take a look at Evans Basic English Code, a shorthand system based off of Phillips Code (for telegraphs). It's a little dated, but the most common words are quite useful. Useful for writing or typing.
https://archive.org/details/evansbasicenglis00evan
(use the pdf, the txt file is a bad OCR and practically useless)
Also useful:
https://en.m.wikipedia.org/wiki/Most_common_words_in_English