How to count the occurrence of a specific string in notepad++?

How can I count the number of occurrences of a string within a text selection?

I installed the TextFX plugin and I see the option to get the word count for selected portion of text in a file.

You don't need the TextFx plugin for this:

• Menu "Search" > "Mark".

• Set "Find what" to the string you want to count.

• Enable "In selection".

• Click "Mark All".

• The bottom of the dialog will update with "Mark: n matches.

• Click "Clear all marks" to remove the marks.

Example:

• Paste your selection in a new tab

• Press Ctrl+F

• Type your word, string, or phrase into the "Find what" box

• Click "Count"

Without the hassle of counting by hand or of installing anything additional : Search and replace by itself and Replace all. This will effectively give you the number of occurrences replaced without actually changing anything.