Definitely seems to be one of the most frequently typoed words in written English on the Internet, enough to bring somebody to create d-e-f-i-n-i-t-e-l-y.com.
Simon Google says, in a completely unscientific manner:
defini tely×105,000,000 (43.4%)
defina tely× 80,000,000 (33.0%)
define t ly× 21,900,000 ( 9.0%)
defina t ly× 18,300,000 ( 7.6%)
defi ant ly× 15,900,000 ( 6.6%)¹
definant ly× 858,000 ( .4%)
definent ly× 217,000 ( .1%)
Why is this the case? What are the reasons behind these misspellings? Are those mistakes limited to the Internet, or are they also present in handwritten English as well?
1Defiantly actually is a word, so that obviously skews the numbers.