Duration in how-to block is considered in content analysis

[mhkuu]

• [x] I've read and understood the contribution guidelines.
• [x] I've searched for any related issues and avoided creating a duplicate issue.

Please give us a description of what happened

To Reproduce

Step-by-step reproduction instructions

1. Create a new post, and add a how-to block to it.
2. Set a duration.
3. Set the keyphrase to "time".
4. Add some more content to make sure the keyphrase density assessment appears. Do not add the keyphrase "time" in this content.

Expected results

1. Keyphrase is found 0 times.

Actual results

1. Keyphrase is found 1 time.

Screenshots, screen recording, code snippet

If possible, please provide a screenshot, a screen recording or a code snippet which demonstrates the bug.

Technical info

• If relevant, which editor is affected (or editors):

• [x] Block Editor
• [x] Gutenberg Editor
• [ ] Elementor Editor
• [ ] Classic Editor
• [ ] Other:

• Which browser is affected (or browsers):

• [x] Chrome
• [ ] Firefox
• [ ] Safari
• [ ] Other:

Used versions

• Device you are using:
• Operating system: Mac
• PHP version: 7.4
• WordPress version: 6.3
• WordPress Theme: default
• Yoast SEO version: trunk
• Gutenberg plugin version:
• Elementor plugin version:
• Classic Editor plugin version:
• Relevant plugins in case of a bug: