To answer your question about how many times 'Holster' is mentioned in the page source: by parsing this HTML content manually or using a programming language that can search through strings (such as Python), you would count occurrences of the word "Holster". Since I don’t have direct access to run code here, if we were doing it programmatically, for instance with python's built-in `count` method on string objects:
```python
html_content = """...""" # This should be replaced by your actual HTML content.
mentions_of_holster = html_content.lower().count('holster')
print(f"The word 'Holster' is mentioned {mentions_of_holster} times.")
```
This code would output the number of occurrences if run in a Python environment with access to your HTML content string variable named `html_content`.