Skeleton Spawners not generating

It seems that skeletons spawners are not spawning or not spawning often enough for me to find. I spent a little over ten hours in creative mode with night vision and speed and found no skeleton spawner in my 1.18.0 world. I then created a new world in 1.18.1 with the same seed and still did not find a skeleton spawner. All I found was zombie and spider spawners.