If you're going to be analyzing a lot of questions, I would suggest that you use SEO tools like SEMrush.
I've had great success with SEMrush because I can take a massive list of keywords and analyze 100 items at a time. This works for both keywords, singular words, double words, phrases, whathaveyou.
Now, as awesome as that tool is, let me clue you in on a secret. If you want to rank a website very quickly, forget about keywords that SEMrush or ahrefs or any other competing SEO tool recommends.
What I mean by that is that they would tell you that a keyword has this much search volume per month and has this keyword difficulty rating.
As awesome as all that information maybe, if you target those keywords you best believe that somebody else will be gunning after them.
This makes your job all that much harder because if you have a lot of people competing for the same small list of keywords, it's anybody's guess when your pages will rank if ever.
The better approach is to find target questions that do show up on Google autosuggest.
So when you type in part of the question, Google will autocomplete the question for you. This tells you that people actually search for that question.
Now, I get excited when I type in that question into an SEO tool and it tells me N/A. In other words, there's no traffic information and there definitely isn't a keyword difficulty rating.
A lot of SEOs at this point get depressed. They think that these keywords are junked.
In contrast, I get excited because I know two things.
1. The chances of somebody competing for those questions are very low.
I mean who wouldn't get depressed by the SEO tool's output for them?
2. I can probably rank that keyword fairly quickly by creating content for it.
And the more I rank for these types of "neglected keywords," the more authority my site builds up in a relatively short period of time.
I do a lot of site and domain analysis, and let me tell you. Based on the patterns I've seen, a lot of people are doing this and this is how they get around the Google Sandbox.
If you've been building websites at any capacity, you know that the Google Sandbox is no joke. Depending on how competitive your target niche is, you can expect to stay in the Sandbox anywhere from 6 months to a couple of years.
Your best approach is to target keywords that few people are targeting.
Not only do you bust out of the Sandbox faster, but you can then start targeting more competitive terms sooner.