With a dataFrame like this:
Time Status ResponseTime PID
2016-07-13 17:33:49 OK 1623 42
2016-07-13 17:33:50 KO 1593 35
2016-07-13 17:33:50 OK 1604 19
2016-07-13 17:33:51 KO 1605 28
2016-07-13 17:33:51 OK 1617 42
2016-07-13 17:33:52 OK 1654 35
2016-07-13 17:33:52 OK 2044 19
2016-07-13 17:33:53 KO 1630 42
How can I draw a kind of a histogram which would present number of KOs and OKs for each minute?