How is “i dare say” used?

In Sense and Sensibility (1995), one line is: “But I dare say, she's left her heart behind in Sussex, hmm?”

Which movie is “i dare say” from?

The clip at the top of this page is from Sense and Sensibility (1995).

But I dare say, she's left her heart behind in Sussex, hmm?

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used when you are saying that sth is probable

14 本の映画に登場

オックスフォード映画の 80%
used when you are saying that sth is probable
But I dare say, she's left her heart behind in Sussex, hmm?
A billet-doux, I dare say.

定義：Oxford Advanced Learner's Dictionary 第 9 版