The growth in the use of “Heritage” with an initial capital is particularly interesting. I can think of three possible reasons:
- that more organisations, eg The Heritage Council, use the word in their titles
- that the word is increasingly used as an abstract noun at the start of sentences like “Heritage is important”
- that the word is increasingly used as an attributive adjective at the start of sentences like “Heritage apples should be preserved”.
Traditional, personal uses (like “My heritage from my ancestors …”) are, I think, less likely to require initial capital letters. That in turn might suggest that Google’s Ngram viewer is reflecting a new(ish) set of meanings for the word and might lead us to ask what that new(ish) usage is (or was) intended to achieve.
It might also lead us to ask whether an even newer concept might now be more useful: one that would dissuade well-meaning folk from preserving and displaying context-free old tat and persuade them to find and record information instead.