Record is related to Maintain. Maintain is a synonym of Observe. Observe is a synonym of Perceive. Hear is a type of Perceive. 
Mainstream is a synonym of Common. Common is a different concept from Occasional. Occasional is a synonym of Casual. Casual is related to Mention. 
Record <--RelatedTo--> Maintain <--Synonym--> Observe <--Synonym--> Perceive <--IsA-- Hear 
Mainstream <--Synonym--> Common <--DistinctFrom--> Occasional <--Synonym--> Casual <--RelatedTo--> Mention 