SheHadTheIdeaWhileCombingHerHair
If creator make new puzzle with the same rules I will publish how I found solition
Looks to be correct. That's basically relevant words to the puzzle + most common english ones. I guess I'll have to wait for more poetic puzzles. There's no need to hide my approach now. Here is the overall progress.
If you type "WhyTheCombOfNatashaOtomoskiHas21Teeth? filetype:txt" into Google, a file called big.txt will pop up. That's what I believed the .txt part to be. You can browse it yourself, but here are some basic facts:
1) There is a woman called Natasha Rostova, whom I believed to be Natasha Otomoski.
2) Interesting paragraph: "Too dear!" Natasha remarked. "How pleased the children will be
and Mamma too! Only you need not have bought me this," she added,
unable to suppress a smile as she gazed admiringly at a gold comb
set with pearls, of a kind then just coming into fashion.
3) Natasha Rostova was born in 1792 and married Pierre Bezukhov in 1813. She was 21 years old at that time.
4) At the end of the file big.txt, there is a list of the most common words, and in the file count_big.txt (change the URL) there is a number of how many times they were used.
5) some code at the very very end of big.txt? (That's why I hoped the answer would be big-picture-thinking, not technical, perhaps irrelevant)
My best tries:
TheCombDoesNotHaveTwentyOneTeeth
ItHasOneToothForEveryNatashasAge
NatashaMarriedSatoshiAs21YearOld
OneToothEqualsAYearOfNatashasAge
SheGotMarriageInOneEightOneThree
SheHadMarriageInOneEightOneThree
P.S: Congratulations to the winner, but again, it could be blockladder themselves after seeing a marketplace starting around their riddle (aka me, quoting, selling my half-baked solution). Now you understand why this all seemed like the correct approach, or just one huge coincidence. Reality works in strange counter-intuitive ways. The answer seems... just a bit off.
See you in another life, guys!