In this paper the author presents his lexicon-grammar of frozen adverbs in Italian, in a general way. One of the important conclusions that emerges from the author's research concerns the existence of similar syntactical structures that are classified by Maurice Gross in his lexicon-grammar of frozen adverbs in French. The two group classifications are therefore similar: the same classes and almost the same syntactical-semantical properties and results. At this point a vast comparative work is justifiable. The author therefore wants to take particular account of the contrastive analyses effectuated on two frozen adverb classes. With the outcome of the corresponding situations, the author has been able to make a definate percentage of the semantic, lexical and syntactical equivalences and differences.