Does a lunar occultation of Mars happen twice a year? The Space Exploration SE question When our Moon is hiding Mars, is it possible to create a radio communication between Earth and Mars? links to this short article in the popular press Mars is hiding behind the Moon this morning with the sub-headline

It’s a twice-a-year occultation; like the eclipse, but it’s Mars, and there’s no shadow

As answer(s) to the question mention, the Moon is smaller than Earth so an occultation would not be visible everywhere on Earth, so let's just consider it an occultation if it happens anywhere on Earth.
Question: Does a lunar occultation of Mars happen twice a year? Is the Moon's diameter big enough and it's orbit's inclination with respect to the ecliptic small enough that it can pass between Mars and some place on Earth twice a year?
Does a lunar occultation of Mars happen twice a year?

No, in the sense that the number of lunar occultations of Mars per year is quite variable and not always two.
I do not have a reference handy, but I am sure that there are some years with no occultations.
And we can see that in other years the number can be both less than and much greater than two:

In 2019, there was one lunar occultation of Mars according to the Astronomical Almanac Online 2019 Lunar Occultations.
In 2020, there were five! See 2020 Lunar Occultations.