[1] The OEC includes a wide variety of writing samples, such as literary works, novels, academic journals, newspapers, magazines, Hansard's Parliamentary Debates, blogs, chat logs, and emails.
[1] A part of speech is provided for most of the words, but part-of-speech categories vary between analyses, and not all possibilities are listed.
For example, "I" may be a pronoun or a Roman numeral; "to" may be a preposition or an infinitive marker; "time" may be a noun or a verb.
The sense count does not include the use of terms in phrasal verbs such as "put out" (as in "inconvenienced") and other multiword expressions such as the interjection "get out!
Also, the Corpus of Contemporary American English (COCA) list includes dispersion as well as frequency to calculate rank.
[1] The list labeled "Others" includes pronouns, possessives, articles, modal verbs, adverbs, and conjunctions.