Hi,
To count the number of cells that contain specific part of text, you can use the function COUNTIF and you have to include
* into criteria. For example to count the number of cells, that include "London", you have to use the following formula:
=COUNTIF(B2:B9,"*London*")
This formula will find 4 matching cells. It counts the cells, that contain "London" at the beginning or at the end or in the middle.