In the present study, I trace the shift of the modal adverb perhaps and its outdone rivals (i.e., peradventure, percase, and perchance) through the history of English. This analysis is based primarily on the OED and its quotation database, complemented by additional data from different datasets, namely, A Corpus of English Dialogues 1560–1760 in Early Modern English and the Brown family of corpora in contemporary English. After extracting instances of perhaps and related expressions from the datasets above, this study examines the following contextual factors: (i) the position occupied by the items in a clause, (ii) the combination of modal verbs in the same clause, and (iii) their parenthetical use. By analyzing the combined data, I provide a time chart for these adverbs and their competition for prevalence.