Matrix Search with a base time of 1 minute.
SR5 p. 241 Matrix Search
...Some information is protected and kept secret, stored in a host that is not publicly accessible. Finding this information usually requires you to find and enter the hosts in which the data is hidden. You can then make a Matrix Search within the host, using a base time of 1 minute (regardless of the kind of information you’re looking for). This only works if the information is at least occasionally accessed by the legitimate users of the host. If the information is archived, you’ll need to dig deeper into the host for that information, a dangerous process that is detailed in the forthcoming Matrix sourcebook.