S3 Standard- infrequent access :
> when the data infrequently access and retrieved fast we opt this type, it retrieves data in milliseconds and its minimum period of storage is 30 days.

S3 Galcier:
its used when the data very rarely accessed like archival data, its very low in cost, it retrieves data minutes to hour depends on the Glacier option selected like expedited, bulk, standard and minimum storage time is 90days