Implementation of reduced time for common words

I load the 1000 top british english words which are in order of how much
they are used. I then modulate the delay down by as much as 0.2 as a
function of usage if it's one of those words and the length is less than
6 letters. The list came from
http://www.bckelk.ukfsn.org/words/uk1000n.html. Key code change is this

if( common_words_hashmap[parsedWord] && parsedWord.length < 6  )
mul = 0.8 + ((1-common_words_hashmap[parsedWord])*0.2);