Combining the fast of Dawood and fasting on Mondays and Thursdays

Dear Brothers & Sisters,
As-Salaamu-Alaikum wa Rahmatullahi wa Barakatuh. (May Allah's Peace, Mercy and Blessings be upon all of you)
One of our brothers/sisters has asked this question:
I know that fasting every other day is the best way of fasting as in the hadith that this is the fasting of Prophet Dawood, alyhi assalam..
but, how can i fast Mondays and Thursdays, and also fast every other day like the Sunnah..? because sometimes Monday or Thursday doesn't fall in the order..like if i fast like the way Prophet Dawood did, i would fast for example: Monday, Wednesday, Friday, Sunday..etc. so sometimes Thursday doesn't fall in the order, or Monday..
I hope my question is clear..
(There may be some grammatical and spelling errors in the above statement. The forum does not change anything from questions, comments and statements received from our readers for circulation in confidentiality.)
Check below answers in case you are looking for other related questions:
Observing voluntary fasts before making up fasts from Ramadan
How is the fast of Dawood (peace be upon him) observed, and how can that be reconciled with the prohibition on fasting on Fridays?

Answer:

Praise be to Allaah.

Islam has brought different kinds of acts of worship, and this is part of the perfection of this religion. There are acts of worship which can be combined with others and other acts of worship which cannot be combined. Fasting on alternate days is one independent type of worship; it is a kind of voluntary fast, and it is the best kind.

Fasting on Mondays and Thursdays is another independent type of worship. It cannot be imagined that it is possible to combine the two on an ongoing basis. The better kind should be given preference, but a person should take his own situation and strength into account, so he should not start something that he will not be able to continue in the case of naafil deeds because the most beloved of deeds to Allaah is that which is continuous, even if it is little. And Allaah is the source of strength.

Whatever written of Truth and benefit is only due to Allah's Assistance and Guidance, and whatever of error is of me. Allah Alone Knows Best and He is the Only Source of Strength.
Your brother and well wisher in Islam

Related Answers:
Joining Sha’baan to Ramadaan
Can fasting the six days of Shawwaal be done on Mondays and Thursdays?
Fasting on his birthday and on the birthday of the Prophet (blessings and peace of Allah be upon him)
Observing voluntary fasts before making up fasts from Ramadan
How is the fast of Dawood (peace be upon him) observed, and how can that be reconciled with the prohibition on fasting on Fridays?

Recommended answers for you:
Ruling on using the masbahah (prayer beads)
Suffering From Waswas (Insinuating Whispers) of the Shaytan About the Essence of Allah
Ruling on women visiting graves
The importance of saying salaam and returning the greeting
Description of the funeral prayer