On our CodyCross answers based website we have the solution for Something happening ad hoc, not a regular pattern. CodyCross game includes different missions and events which update daily so you can earn tokens that are mostly needed to help with answers for challenging clues. Now let's focus on the answer you need for Something happening ad hoc, not a regular pattern by scrolling down which is part of CodyCross Nursery Rhymes Group Puzzle 15.
