Chahal and Yadav have bamboozled the South African batting line up with their wrist spin in the first two ODIs in Durban and Centurion to help India take a 2-0 lead in the six-match series.
"I think there is a bit of novelty factor there. It is not about wrist finger or finger spin, it is about the ability to adapt," said Ashwin when asked about the success of Chahal-Yadav duo in South Africa.
"When T20 first started people thought there was no place for spinners. Then, finger spinners dominated literally for 10 years and then wrist spinners started doing well, which is good. It is more about adaptability," he said.
But Ashwin said he was not losing sleep over his ODI place and instead was focusing on strengthening his armoury.
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"As I told you I can only do my part. I don't think I am at that phase of my career that I am going to fret much and look forward to something," he told reporters on the sidelines of the Vijay Hazare Trophy Group 'C' match between Tamil Nadu and Gujarat here.
The lanky Tamil Nadu cricketer, who has been trying his hand at leg-spin in recent times in local matches, said it was a part of his plan going into the upcoming Indian Premier League and future.
"I am not looking at it as evolution or anything. I have been practising that for some time. This is part of my plan going into the IPL and all that.
He also said he was try new things out in matches and moreso in pressure situations.
"I am getting good game time. Doing it under pressure is more important," the tweaker said.
"To be honest my career has been such that people have always said I tried a lot. And when I didn't try a lot I lost my place. It is a kind of give and take, the game's demands are such."
"Most of the talk has been pretty much overrated. Yes, I have failed for a game here and there. It has to be taken in perspective. I am sure people do fail on occasions.
"I have had opportunities to get big hauls, and it has not turned around. But I am sure it will turn around," he said.
Ashwin, who played for Worcestershire last year, said he would again ply his trade in the county circuit after the IPL.
"We start on August 1. So there will be about two-three games or four at max. But that will be good practice. I am still talking. If at all I am going, I will be going back to Worcester," he added.