Although mining success is based on computer processing power available, it takes 10mins on average to mine a Bitcoin. The Bitcoin “code” was designed to create “blocks”, which include transactions every 10 minutes. Once a block is mined (i.e. verified) “miners” would receive 50 Bitcoin. The Bitcoin “code” was also designed to halve the reward approximately every four years. This reward today stands at 12.5BTC/block/10mins. Bitcoin halvings have happened in 2013 and 2017, with the next one due in approximately July 2020.