Wiktionary:Criteria for inclusion
Definition from Wiktionary, the free dictionary
To be included a word should have been used in at least three independantly recorded instance over a period of at least one year, unless,
- The word is used in a well known work.
- The word is in widespread use.
- Common usage of the word is attested in a reputable academic work.
Recorded can mean in publically available written texts or in audio/visual productions.