what is the meaning of skew in write skew or read skew

Question

I am learning database transaction in DDIA, There are two concepts of skew in this book, one is unbalanced workload with hot spots, the other is timing anomaly, I can not understand the meanning of 'timng anomaly' and why is called skew.

The term skew is unfortunately overloaded: we previously used it in the sense of an unbalanced workload with hot spots (see “Skewed Workloads and Relieving Hot Spots” on page 205), whereas here it means timing anomaly.

I want to kow how to explain the menaing of skew in this case