Is what is understood from Ibn Mas'ud's saying, "Recite the Qur'an, and stir hearts with it, and let not the end of the surah be the sole concern of any of you," a determination of a specific time for recitation (e.g., half an hour) instead of a specific quantity (e.g., a juz' daily) to avoid the reader's preoccupation with finishing the surah, and does this contradict the hadiths that specified a certain quantity for recitation, such as ten verses or one hundred verses?

This narration from Ibn Mas'ud (may Allah be pleased with him) calls for contemplating the Qur'an and reciting it with deliberation, not rushing through it like poetry, nor scattering it like dried dates. It also encourages pausing at its wonders to stir the hearts with it, and not making the reader's sole concern to finish the surah (definition) or read the largest quantity at the expense of quality.

This does not contradict the hadiths that encourage reciting the Qur'an and performing Qiyam (definition) al-Layl with it.