Depends on internet bandwidth, proxy speed and your PC or servers CPU speed and RAM.
Mind you with public proxies I'm surprised the task even finished. In 88 minutes chances are by the time you finish it about 90% of them will be dead.
It will have spent most of the time squeezing results through just a handful of proxies.
Cheap - sure - but public proxies are very slow and unreliable. So 88,000 results in that time frame seems a fare return for next to zero financial outlay.
I do between 5000 and 25,000 keywords and it can take between 24 and 72 hours through 80 private proxies but only 8 running threads (but that's 25,000 keywords - not 190)
Scritty