Manage & delete your Search history - Computer - …
https://support.google.com/websearch/answer/6096136?hl=en&co=GENIE.Platform%3DDesktop
On your computer, go to your Search history in My Activity. On the left or at the top, click Controls. On the "Web & App Activity" card, click Auto-delete (Off) . If you find “Auto-delete (On), ” Google automatically deletes your Web & App Activity, which includes your Search history, after a specific time period.
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