Provided the input sentence, you're expected to write a question that involves event "frequency", which refers to how often an event is likely to be repeated. For example, "taking showers" typically occurs ~5 times a week, "going to Saturday market" usually happens every few weeks/months, etc. Don't create questions which have explicit mentions of answers in the text. Instead, it has to be implied from what is given. In other words, we want you to use "instinct" or "common sense". Also, the written questions are not required to have a single correct answer.

Input: Consider Input: Sentence: In another major paper from this era, Einstein gave a wave equation for de Broglie waves, which Einstein suggested was the Hamilton-Jacobi equation of mechanics.

Output: How often did Einstein publish his wave equation?


Input: Consider Input: Sentence: While these laws were met with skepticism and ridicule, they've often become standard practice in other states.

Output: How often do the laws become standard practice in a state?


Input: Consider Input: Sentence: With this, it became impossible for me to stay upstairs, he said, pointing to the scars on his forearm.


Output: How often did he consider moving out after he got his scars?


