دوره سه‌ماهه
type: Concept
preferred label: trimester @en
related: سال

سال
type: Concept
broader: مدت
preferred label: year @en
related: دوره سه‌ماهه
related: ماه (جزء فصل)
related: سالیانه
related: قرن
related: نیم‌سال

قرن
type: Concept
preferred label: century @en
related: سال

ماه (جزء فصل)
type: Concept
preferred label: month @en
related: سال

نیم‌سال
type: Concept
preferred label: semester @en
related: سال

مدت
type: Concept
narrower: سال
preferred label: duration @en

سالیانه
type: Concept
preferred label: annual @en
related: سال