While recent corpus linguistic research often focuses on the text–lexis interface, the present study aims to investigate the ways in which grammatical forms can be related to textual functions of lexical items. This question is explored through a functional analysis of the plural noun “days” in comparison with that of its singular counterpart studied in Mahlberg (2005). Results from the qualitative analysis and quantitative comparison of distribution patterns of the two nouns reveal that the functional profile of the plural form is different from that of the singular form in some aspects, as far as textual functions of time nouns are concerned. This is argued to illustrate the inseparability among text, lexis and grammar.