Observant readers will note that the data axis of this graph is actually logarithmic. This is because the first trial (for "ar") created a large enough value that the interesting patterns (or lack thereof) in subsequent results were completely invisible on any reasonably-sized graph. The first search resulted in over 600,000,000 hits, while the smallest result (for "arrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
It is interesting to note that the prevalence of piracy is not monotonically decreasing with an increasing number of "r". It stops being monotonically decreasing from 16 to 17, when 16 "r"s have 847 hits but 17 have a surprising 17,300. 18 drops back to 694; the cause of this sharp numerical spike is unknown, and I invite hypotheses about the true meaning of this data.
I also kept track of suggestions Google made on "Did you mean:" for every search in which such an option was presented. Near the beginning, most of the suggestions- when they were made- suggested that I use fewer "r"s, while in the end, I almost always received a suggestion and it asked if I shouldn't be leaving off the "a". I suspect that by the end, Google was merely desparate for me to stop and was making these suggestions in a futile attempt to get me to shut up. Unfortunately, I have no way to test this hypothesis.
The entire collected data is available here. I invite further study and analysis of this important data about piracy on the Internet.