A more thorough explanation:

Quadragesimals are offerings made by daughter churches to the mother church on Mid-Lent Sunday. The name comes from the Latin word "quadragesima," which means "the fortieth."

For example, a small church might give a portion of their tithes and offerings to the larger church that oversees them on Mid-Lent Sunday as a sign of unity and support.

Quadriennium is a term from Roman law that refers to the four-year course of study required of law students before they were qualified to study the Code or collection of imperial constitutions.

For example, a law student in ancient Rome would have to complete a quadriennium of study before they could move on to more advanced legal studies.

Quadriennium utile is a term from Scots law that refers to a four-year period after the attainment of majority within which the young adult may seek to annul any contract made while the person was a minor.

For example, if a person in Scotland signed a contract when they were 17 years old, they would have four years after turning 18 to seek to have the contract annulled if they felt they were taken advantage of due to their age.