Frequency is related to Sound. Sound is related to Communication. Communication is related to Express. Express is a synonym of Word. 
Commodity is a type of Artifact. Information is a type of Commodity. Heritage is a type of Information. Heritage is a synonym of Legacy. 
Frequency <--RelatedTo--> Sound <--RelatedTo--> Communication <--RelatedTo--> Express <--Synonym--> Word 
Artifact <--IsA-- Commodity <--IsA-- Information <--IsA-- Heritage <--Synonym--> Legacy 