reckon upon (someone or something)

1. To consider or anticipate something as a factor in some decision, situation, or outcome. (A more formal and old-fashioned variant of "reckon on.") They didn't reckon upon the overwhelmingly negative reaction to their announcement. We reckoned upon running into a few obstacles when we first started planning this project. The criminal hadn't reckoned upon a detective being aboard the train with him.

2. To depend or rely on someone or something. I have always reckoned upon my father for advice. I just don't know what to do now that he's gone. We must not reckon on their concurrence on this matter, for they shall not change their position.