In how many days are we allowed to read the whole Quran? What is the minimum period of time to read the whole Quran?

Dear Brother / Sister,

Abdullah b. Amr was a Companion who devoted his night and day to Allah. He started to spend his life fasting and performing prayers. Abdullah narrates the following about this state:  

"My father married me off to Umra, the daughter of Abdullah b. Abbas. However, I was not very interested in her since I spent my time fasting and performing prayers. Once, my father came to see his daughter-in-law. He asked her about me. She said, 'My husband is one of the most honorable men but she is not interested in me.' My father became sorry when he heard this and said to me, 'O my son! I married you off to one of the most honorable women of Quraysh but you acted like this and that.' Then, he went to the Messenger of Allah and complained about me. The Messenger of Allah sent for me after listening to my father. The Prophet (pbuh) said,

- Do you fast every day?
- O Messenger of Allah! Yes.
- Do you perform prayers at night?
- O Messenger of Allah! Yes.

Thereupon, the Messenger of Allah said,

— I perform fasting on some days and eat on others. I perform prayers and sleep. I also take care of my wives. This is my Sunnah. He who abandons my Sunnah is not of me.

The Messenger of Allah (pbuh) said to me,

"Read the whole Quran once a month." I said,
"I feel stronger than that." He said,
"Then, read the whole Quran in ten days." I said,
"I can read more." He said,
"Then, read the whole Quran in three days." Then, the Prophet (pbuh) said,
"Perform fasting three days a month. I said,
"I can fast more than that." He said,

However, the Messenger of Allah did not allow me to fast more. I asked to fast more. Then, he allowed me. When I insisted on fasting more, the Messenger of Allah (pbuh) said,

"The most virtuous fasting is the fasting of Dawud, my brother. He fasted one day and ate the next day." Then, he added the following:

"There are times when every worshipper wants to worship more. However, it is followed by a weariness. At that time, man follows either the Sunnah or bid’ah. He who follows the Sunnah at the time of weariness attains guidance. He who follows another way is destroyed." (Bukhari, Sawm, 55, Nikah, 89, Tahajjud, 20; Muslim, Siyam, 192; Nasai, Siyam, 76; Ibn Hanbal, II, 194, 198)

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