"For data related to the search requests, Swisscows keeps for 7 days the keywords connected to your IP address and the user agent of your browser. The keywords are then stored without any associated personal data. For data related to the HTTP connections, Swisscows stores it for 60 days. After this period there will be no evidence that a user ever visited Swisscows."
https://edit.tosdr.org/points/20798
https://www.privacytools.io/privacy-search-engines/
