a veces

= at times, sometimes, at various times, from time to time, on occasion(s)
Ex: The term category has been at times used somewhat loosely in the literature of indexing and, for this reason, it can cause confusion. Ex: Plainly such representative sections may not be present in many documents, but sometimes an extract from the results, conclusions or recommendations of a document may serve to identify the key issues covered by the entire document. Ex: At various times the library holds computer classes for children and adults. Ex: From time to time it may be necessary to consult external references sources in order for the indexer to achieve a sufficient understanding of the document content for effective indexing. Ex: The notation uses upper case letters and arabic numerals 1 to 9; and on occasion the hyphen.