The word "modal" refers to a way of doing something or a characteristic that is typical or common. It describes a method or behavior that is considered as a standard or model. Full definition
This lesson focuses on the use of modal verbs of probability and advice in the past tense. (thoughtco.com)
While the focus is on the past forms of modal verbs of probability and advice (i.e., must have been, should have done, etc.), it also serves as a great starting point for a discussion of issues that are sure to be hotly debated. (thoughtco.com)
* Annualized Premium shall be the premium payable in a year chosen by the policyholder, excluding loadings for modal premiums, if any, and applicable taxes. (bharti-axalife.com)