Invariably, clusters have degrees of freedom which I’ll call wiggle room. For a holiday cluster, which holiday do you look for and once you pick the holiday, say Chanukah, which words do you look for? In a Chanukah cluster, you could look for names of the Maccabees and other historic figures, words connected with the temple, words connected with miracles in general, words connected with candles or even words like latke, dreidl and sufganyiot. Moreover, the Hebrew language multiplies each possibility into many. Do I place a hey (for the definite article) in front? Do I include the extra yuds and vavs that can occur in variants of some words.