You need to do it for more than 2 hours.
In some hours no blocks are found, in others 10 mght be.

If you look at this page https://give-me-coins.com/pool/block_stats you can see the varience in time taken to find blocks.
On this page you can see how many blocks were found per hour..
https://give-me-coins.com/pool/pool_stats

The hash rate on give me coins dos bounce all over the place not sure if this is to do with vardiff, but I find that the average over say a day is pretty much what my rigs are doing, but sometimes it'll say <3Mh/s, then others >6Mh/s. where the daily average is somewhere in the middle.

I'm no expert, but some pools seem well dodgy, give me coins seems ok to me.  I generally mine feather coin there and get what I expect.