Zach, on several occasions, refers to calculus and wonders if it could be applied to sports.
That calculus has governed casting on The Bachelor since its 2002 debut on ABC.
More significantly, the calculus of holding territory has now changed.
1660s, from Latin calculus "reckoning, account," originally "pebble used as a reckoning counter," diminutive of calx (genitive calcis) "limestone" (see chalk (n.)). Modern mathematical sense is a shortening of differential calculus. Also used from 1732 to mean kidney stones, etc., then generally for "concretion occurring accidentally in the animal body," such as dental plaque. Related: Calculous (adj.).
calculus cal·cu·lus (kāl'kyələs)
n. pl. cal·cu·lus·es or cal·cu·li (lī')
An abnormal concretion in the body, usually formed of mineral salts and most commonly found in the gallbladder, kidney, or urinary bladder. Also called stone.
Dental tartar.
calculus (kāl'kyələs) Plural calculi (kāl'kyəlī') or calculuses

The branch of mathematics, usually studied after algebra, that provides a natural method for describing gradual change.
Note: Most modern sciences use calculus.