WolframAlpha understands a subset of Mathematica notation. For example it understands this:
Partition[First[RealDigits[Pi,10,100]],4,1]
which gives each subsequent overlapping four tuple of the first 100 digits of Pi in base 10.
What I would then want to do is to find the position of a particular four tuple in that using something like
Position[Partition[First[RealDigits[Pi,10,100]],4,1],{1,5,9,2}]
Unfortunately it appears that the word "Position" somehow confuses this and it is not able to find the position of that four tuple. More unfortunately, I have not been able to find any alternate form of query to accomplish this. But perhaps this might give you or someone else some idea that will lead to a solution.