Step 1. Login to Your Google Account
Step 2. Visit https://myactivity.google.com/ (you will see date-wise search information)
Step 3. On the top right side of the page, click on the three-dot menu icon
Step 4. Next Click Delete activity by
Step 5. Select "Delete by date," select the time using the Down arrow.
Step 6. Click Delete Button (All the search histories will be deleted)