There is a site that lets you search for any word in Tanach and it will return the number of occurrences throughout the whole Tanach. It will also show you the Posukim.
Here are some interesting searches.
1) אהבה has a Gematria of 13 and also appears 13 times in the whole Tanach. The word חבר also appears 13 times in the whole Tanach. The word אחד, which also has Gematria of 13 appears exactly 400 times in the Tanach.
What’s it mean? Well there is a connection between friendship, love, and oneness. What about the 400 times that אחד is found? Any suggestions?
2) The word שירה only appears once in Tehillim (link). I would have expected it to appear much more.
3) מרכבה is found four times in the whole Tanach (none of which are in Yechezkel). The four letters in Hashem’s name… the four animals on the Merkava… lots of relation to four.
4) הַלָּזֶה is found three times in the whole Tanach (link). Rabbi Wagensberg discusses this word in great detail in Parshas Chayei Sarah, where Rivkah asks the Eved (after seeing Yitzchak in the field for the first time) מִי הָאִישׁ הַלָּזֶה. He explains that she answered her own question. “Who is this man?” The answer is: הַלָּזֶה He explains that HaLaZeh is an allusion to Yitzchak who was resurrected at the age of 37 (לז) after the Akeida and explains the special association with the two Hei’s.
I could spend hours looking things up. I think it’s amazing how accessible this is and finding secrets in the numbers of the Torah is a nice reminder that Hashem is One. It is important to try to expound on things you find so they leave more of an impression than “wow”, but even if that’s all you feel you have time for, I suggest you go to that website and look up a few words up that you’re interested in and comment here with what you find. (I’m assuming that somebody will read this.)