Premise: An arresting one occurs in A Passage to India (Chapter XXI) in which Forster describes a small building as  a flimsy and frivolous erection,  while in The Mayor of Casterbridge (Chapter XVI) the Mayor himself  beheld the unattractive exterior of Farfrae's erection.

Hypothesis: The word erevtion was not seen in the book a single time. 
Relation: contradiction