Lookup File data retention Question

Hi Team, I have requirement to show last 90 days worth of app login stats broken by day. I have a lookup table/defnition created and i have saved search that writes the summary data every morning 5 am for the previous day onto the lookup. Question i got, is there any time limitation until which lookup will retain this data before which it starts truncating or deleting data? I expect the data would remain intact however i wanted to check with wider audience to see how your experiece has been. I understand better way would be to either create summary index or kv store, i am not going that route as it would need 2 weeks to get it out to production in my space and i need something quick. Please share your thoughts. Mine is clustered environment (both SH & indexers) , version is 6.6+ Thanks!