How many such pairs of letters are there in the word INSTRUCTION which have as many letters between them in the word as in the English alphabet?

Between S and T in the word, there are 0 letters, and similarly, in the English alphabet, there are none in between.

Between I and C in the word (NSTRU), there are 5 letters, and the same gap is there in the alphabet as well (D, E, F, G, H).

Between O and N in the word, there are 0 letters, and similarly, in the English alphabet, there are none in between.

Between N and T in the word (STRUC), there are 5 letters, and the same gap is there in the alphabet as well (O, P, Q, R, S).

Thus, we have 4 such pairs.