给定一个英文文本，输出每个单词出现的次数，不区分大小写。

The quick brown fox jumps over the lazy dog. The dog slept over the verandah. The fox jumped over the fence.
the: 4
quick: 1
brown: 1
fox: 2
jumps: 1
over: 3
lazy: 1
dog: 2
slept: 1
verandah: 1
jumped: 1
fence: 1