A method, performed in a character entry system, for interrelating character strings so that incomplete input character strings can be completed by a selection of a presented character string involves computing contextual associations between multiple character strings based upon co-occurrence of character strings relative to each other in documents present in the character entry system, in response to inputting of a specified threshold of individual characters, identifying at least one selectable character string from among the computed contextual associations that can compete the incomplete input character string in context; and providing the identified at least one selectable character string to a user for selection.