 A host of frequency terms such as “frequently” (frequenter), “more frequently” (ut frequentius) and “for the most part” (ut in pluribus), or their converses such as “rarely” (ut in paucioribus), often accompanied ascriptions of probability in medieval scholasticism. What frequently or usually happened was prima facie considered to be probable. Scholastic usage of frequency terms followed ancient precedent, most notably Aristotle’s statements of what is true or false “in most cases” (hōs epi to polu). Whether this background in Aristotelian science and methodology justifies the assumption of a medieval frequency concept of probability will be discussed in Section 3.2.