Is faith a skill that can be developed over time?

Is faith a skill that can be developed and made stronger through effort, following a method? If such a method exists, can it be tested, and by any human being? In other words, if the most skeptical atheist takes on the challenge of applying this method thoroughly and meticulously, would he or she reap the fruit of faith eventually over time? Or is faith rather a gift, a supernatural gift, given by God only to a privileged subset, and therefore not attainable via effort? Or is faith both a gift and a skill, requiring some sort of synergystic cooperation between the will of the person and the grace of God? What is an overview of perspectives on the nature of faith, what causes it, how it can be attained, how it can be made stronger, the extent to which any person on the planet (including the most skeptical atheist) can acquire it by exercising their own free will by following a particular method? Note: this is a follow-up to https://christianity.stackexchange.com/q/99616/61679