Sentence:  Newspaper advertising was mainly concentrated in the New York Times and the Wall Street Journal ( Eastern and Midwestern editions ) which <WSD>averaged</WSD> two prominent ads per month , and to a lesser degree the New York Herald Tribune and , for the west coast , the Los Angeles Times and the Wall Street Journal ( Pacific Coast edition ) . 
Meaning of the word marked with <WSD> tags:  amount to or come to an average, without loss or gain