Regular expression for finding all sub strings which are NOT inside a HTML link element

Question

Assuming I have the following HTML snippet:

Deep Work 
<p>
<a data-href="Deep Work" href="Deep Work" class="internal-link" 
target="_blank" rel="noopener">Deep Work</a>
</p>
Deep Work
<a href="blabla">Some other text</a>

Which regular expression will only match the two "Deep Work" text snippets which are located completely outside of the a-blocks? So, only the ones marked as yellow in this screenshot (not the red ones):

I tried multiple approaches, but always ended up getting a match for the last red one. Which I need to avoid. Thus I would appreciate any help from the community. Thanks!

Update: Unfortunately I simplified the HTML code above too much, using line breaks, to get it readable in StackOverflow. Here is better use case:

<p><a data-href="Deep Work" href="Deep Work" class="internal-link" target="_blank" rel="noopener">Deep Work</a> Deep Work <a data-href="Deep Work" href="Deep Work" class="internal-link" target="_blank" rel="noopener">Deep Work</a> Deep Work </p>

Again only the two "Deep Work" mentions outside any A-block should be found by the RegExp.