A few years ago in my garden I built two shallow lily ponds and put goldfish into them. They multiplied. But dogs tore the liner and ruined the ponds, so in the fall I drained them and gave away the fish.
Later that fall, much rain fell, and in the winter, much snow. Two or three inches of water formed in the bottom of the pools. It must have been frozen solid for at least a month and must have frozen solid and thawed a number of times. There may have been times when the pools were dry.