Today's lunchtime excel project was to replicate their results. Using a simplified 27 key keyboard (26 letters plus space), and a rate of 1 character per second, and assuming random choice of key it would take a single simian 170,000 years, typing 24/7 to type "cyclechat". Every 6,000 years or so it would get as far as "cyclecha" and then get the last letter wronf.
Those assumptions are a bit dodgy. I think we should allow, as
@twentysix by twentyfive says, time off for banana breaks and so on. And I suspect a typing chimp would not give equal priority to all keys, it would probably smack its fat finger down in the middle repeatedly.