One common way to gauge whether an English verb phrase is telic is to see whether such a phrase as "in an hour", in the sense of "within an hour", (known as a "time-frame adverbial") can be applied to it. Conversely, a common way to gauge whether the phrase is atelic is to see whether such a phrase as "for an hour" (a "time-span adverbial") can be applied to it. This can be called the "time-span/time-frame test". According to this test, the verb phrase "built a house" is telic, whereas the minimally different "built houses" is atelic: