How many dates over the year (that an observant jew can fly) have I available?? i call this rare....
Right now? A ridiculous amount. As well plenty of X/XN, the amount of PZ/PN is astonishing.
My point is, look at any one flight, there is likely a seat available once in every 7 days, and for many routes every day, so there is nothing rare, as airlines are opening everything.