Politician is related to Job. Job is related to Company. Company is related to Board. Board is related to Life. 
Bottom is related to Cotton. Cotton is related to Common. Common is related to Rare. Rare is the opposite of Frequent. 
Politician <--RelatedTo--> Job <--RelatedTo--> Company <--RelatedTo--> Board <--RelatedTo--> Life 
Bottom <--RelatedTo--> Cotton <--RelatedTo--> Common <--RelatedTo--> Rare <--Antonym--> Frequent 