Assertion: couple's relationship | /r/HasProperty | infrequent
Facets:
value: very
type: DEGREE
value: historically
type: TEMPORAL
Source sentences:
text: Although age-hypogamous relationships have historically been very infrequent, recent US census data has shown an increase in age-hypogamous relationships from 6.4% in 2000 to 7.7% in 2012.