You can find the analysis function "ABAP Scan" in the System Scout:

The ABAP Scan for strings/keywords allows searching for any string in the whole BW source code. So it is possible to search for a certain table name, a Variable or Query name or for statements like e.g. "select single"
First, a keyword must be entered into the input field:

With the filter button, you can start an ABAP Scan for multiple strings.

The search is not case sensitive, so it does not matter if you use upper or lower case letters
Wildcards are not supported
When searching for InfoProvider tables better use the normal where-used analysis, because there the table names will be derived from the InfoProvider name

The check of the usage of the keyword can be done for different types of ABAP coding and comments:

System Scout then displays in all places where the keyword is used in the ABAP coding:

The first column Usage Of identifies the searched string of the row in the result grid.

To analyze the coding more precisely, it can be displayed completely via the entry "Show Source Code" in the context menu:

The entire coding is then displayed and the searched keyword is highlighted: