This directory is for various lexical resources, such as lists of "X most frequent" or "X most fundamental words" in the English language, words lists by syntactic categories, the data on the word inflection (i.e., tenses and aspects of verbs), etc.
Specifically:
5000_words_coca.csv, 5000_words_coca.xlsx - the list 0f 5000 most frequent words in American English, gathered from the Corpus of the Contemporary American English (COCA). See https://www.english-corpora.org/coca/. The datasets contain the words themselves (in alphabetical order) as well as the frequency data and the part of speech tag for each word.
dolch_wordlist - the list of 220 English words composed by Edward Dolch in the 1930s and 1940s. The list is based on the children stories designed for the readers up to the elementary school. The file contains just the words in alphabetical order.
ogden_wordlist - the list of 850 Basic English words composed by Charles K. Ogden in the 1930. The list is designed as a basic vocabulary for the people learning English as a second language. The file contains just the words in alphabetical order.
NGSL+1.01+by+band.csv, NGSL+1.01+by+band.xlsx - The New General Service List is an expanded version (composed in 2013) of the classic General Service List (composed in 1953) which was intended, pretty much like Ogden's list, for the ESL learners. The purpose was to collect the smallest subset of English vocabulary with the maximum coverage of texts. The NGSL contains about 2800 unique word lemmas, along with the usage frequency and various words forms. That is, the entry for "be", also contains forms such as "was", "being", "am", etc.
BNC_top_2164_nouns - the list of 2164 most frequent nouns from the British National Corpus (BNC), covering about 80% of 19,278,169 total noun occurrences in the corpus. The data are formatted into two columns, where the first column lists the (probably absolute) frequencies of the words and the second the words themselves. The data are sorted in a descending order of frequency. The list was compiled by Jonathan Gordon.
Note from J. Gordon: "I included the plural nouns, making them singular when I could. So, 'scissors' remains plural, but 'pants' was turned to 'pant' (which is how it is in WordNet: they just note 'usually in the plural'). There are probably some erroneous singulars in there, but I think this is good enough."
BNC_nouns_freqs - contains the list of all (about 169000) the nouns from the BNC along with their absolute frequency in the corpus. The data are formatted in a similar way to Jonathan's list and sorted in a descending order of frequency.