S3 Standard: "Designed for 99.99% availability over a given year" [1]

Standard - IA: "Designed for 99.9% availability over a given year" [2]

Glacier: "Retrieval jobs typically complete within 3-5 hours." [3]

[1] https://aws.amazon.com/s3/storage-classes/#Amazon_S3_Standar...

[2] https://aws.amazon.com/s3/storage-classes/#Infrequent_Access

[3] http://aws.amazon.com/glacier/faqs/#How_can_I_retrieve_data