Refers to every one of two or more considered individually.

प्रत्येक

English Usage: Each week, the team meets to discuss progress.

Hindi Usage: हर सप्ताह, टीम प्रगति पर चर्चा करने के लिए मिलती है।

Indicates the frequency of an action occurring every week.

हर सप्ताह

English Usage: We will have our meetings each week at the same time.

Hindi Usage: हम अपनी बैठकों को हर सप्ताह उसी समय करेंगे।