A more thorough explanation:

Assisa proroganda is a legal term in Latin that means "of the proroguing of an assize." It refers to a writ that orders justices to postpone an assize because a party is busy in the Crown's service.

For example, if a person is called to serve in the military or perform some other important duty for the Crown, they may request an assisa proroganda to delay their court case until they are available to attend.

Another example might be if a key witness in a trial is suddenly unable to attend due to illness or other circumstances. In this case, the court may issue an assisa proroganda to reschedule the trial for a later date when the witness is able to testify.

These examples illustrate how the writ of assisa proroganda can be used to delay court proceedings in certain circumstances, such as when a party is unable to attend due to important obligations or unforeseen events.