Frequency of occurrence is an important attribute of lexical units, and one that is widely used in psychological research and theorization. Although printed frequency norms have long been available for Spanish, and subtitlebased norms have more recently been published, oral frequency norms have not been systematically compiled for a representative set of words. In this study, a corpus of over three million units, representing present-day use of the language in Spain, was used to derive a frequency count of spoken words. The corpus consisted of 913 separate documents that contained transcriptions of oral recordings obtained in a wide variety of situations, mostly radio and television programs. The resulting database, containing absolute and relative frequency values for 67,979 orally produced words, is presented. Validity analyses showed significant correlations of oral frequency with other frequency measures and suggest that oral frequency can predict some types of lexical processing with the same or higher levels of precision, when contrasted with text-or subtitle-based frequencies. In conclusion, we discuss ways in which these oral frequency norms can be put to use. The norms can be downloaded from www.springerlink.com.Keywords Word frequency . Spoken word frequency . Frequency estimates . Spanish norms Lexical frequency is a descriptive attribute that makes reference to the extent to which a particular word is used by the speakers of a given language. The findings of many diachronic linguistic studies have suggested that the frequency with which linguistic units are produced and encountered in the course of verbal interactions modulates the way in which languages change over time, affecting variations in phonology, morphology, and grammar (Bybee, 2007). For example, quantitative analyses of word usage throughout extended periods of time have revealed that, at least in Indo-European languages, terms that occur very frequently in discourse are more resistant to change than are those in lesser use (Pagel, Atkinson, & Meade, 2007). Additionally, and more relevant to the purpose of this study, the results of many psychological experiments entailing the control and manipulation of verbal materials indicate that lexical frequency is involved in important aspects of human cognition related to language and memory.Psycholinguistic studies have consistently found that, when other variables are held constant, higher frequency words are more readily processed than lower frequency words in tasks such as word recognition, lexical decision, and naming (e.g.,