Interval times for block rewards


I understand that 750,000 ENG will be rewarded to nodes for the first year of mainnet and decrease by 10% per year afterwards. I would like to know if there are plans yet for how often rewards will be attributed to nodes?

For instance, a monthly distribution (750,000 ENG / 12 months) would yield 62,500 ENG to be split up among nodes in ratio to the amount of processes performed during that month.

Any clarification would be greatly appreciated. Thank you!