WIY, a woman’s chiyuv of learning Torah differs greatly than a man’s. Her chiyuv is to know the halochas of the mitzvos in which she is obligated. Therefore her learning is part and parcel of doing her “mitzvos”, and not Torah for the sake of learning itself.
However, she still does have a part of real Torah learning by encouraging her husband and sons to study Torah. That is her true chelek b’Torah!
Therefore, you cannot draw a parallel that since you learn (only) a few hours a day, that your wife should also learn at least weekly. That is comparing apples to oranges.
Finally, after 120 years you will be asked if YOU were koveh itim b’Torah. You will NOT be asked if you made sure that your wife is koveh itim!
My Rebbitzen learns every day and it is geshmak to speak in learning with her, but sometimes I think she would get more s’char if she spent the time encouraging my learning with a special sandwich for lunch or a freshly made supper. I personally do not need these “encouragements” but I think she would get more of a Gan Eden. I wish I could set up my wife with you wife for a chavrusa-shaft. My wife does daf yomi.
Each one of us has an eizer k’negdo. It is our brocha and our nisoyon.