I want to say “some 50 or more yards apart” (meaning at least 50 yards apart) but I’m not quite sure it’s correct. What’s the best way to find a good example of using Google Search?

I have a question about “after 20 years or more” if I searched elsewhere. I find the answer a little ghastly. How can I find out how to use two phrases?

Is it easy to find examples on the web when there are very precise figures involved? Indeed I had to search several times using different numbers and slightly different wording.