90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
The term was coined in 2012 by the British rap artist Lethal Bizzle while playing a video game with his cousin, Arsenal footballer Emmanuel Frimpong. It quickly became popular, partly due to the fact that it is also the surname of the popular British actor Dame Judi Dench.