The parliament of Papua New Guinea voted in late November to extend to 30 months, from the current 18, the “grace period” following the installation of a government during which no-confidence motions are not permitted (see The Australian).
Note that the term of the PNG parliament is five years. If this measure is confirmed in a final vote set for 5 February, it would mean for fully half the term of parliament, there would be no effective responsibility of the government to parliament.
Most (all?) classifications of the world’s political systems–including some published under my own name–have PNG among the parliamentary democracies. However, calling this system parliamentary is becoming increasingly inaccurate.
Shugart and Carey (1992) refer to a hybrid type in which the assembly selects the executive, which then is not subject to confidence, as “Assembly-Independent”. PNG is trending that way, though not completely, as there will remain periods in which parliament may engage the responsibility of the government.
(I recall that there also exists a period leading up to an election in which no-confidence moves are not allowed.)