Amphibracs are never used to construct a whole, serious poem. So they mainly occur as variants within, say, an anapaestic structure.
... size is 2.26 and the average family size is 2.91. In the village the population is spread out with 21.7% under the age of 18, 5.1% from 18 to 24, 32.6% from 25 to 44, ...