Pool share difficulty at the moment is 0.108 so at constant mining at say 4 kh/s you'd be likely to find a share in about 1.34 days according to the Coinwarz calculator at http://www.coinwarz.com/calculators/infinitecoin-mining-calculator/?h=4&p=500.00&pc=0.10&pf=0.00&d=0.10800000&r=65536.00000000&er=0.00000001&hc=0.00  . As it says there, this can very greatly depending on your luck.  Once you find a share you'll then start getting payments until that share runs out, or, if you find a further share before the first runs out, until that further share runs out etc.

With the hashrate that you mentioned it's best to use  iA6Yvv44fv2onsMHHZeiCWJT9W4i6LiuBn+0.00000582 rather than the +0.00011641 that you've posted.  This will help your hashrate graphs look more accurate.  At the moment I can only see red peaks mostly at around 1kh/s on your hourly graph.