This article gives a good explanation: http://searchengineland.com/when-ocr-goes-bad-googles-ngram-viewer-the-f-word-59181 http://searchengineland.com/when-ocr-

This article gives a good explanation: http://searchengineland.com/when-ocr-goes-bad-googles-ngram-viewer-the-f-word-59181 http://searchengineland.com/when-ocr-goes-bad-googles-ngram-... Also interesting: http://ngrams.googlelabs.com/graph?content=suck%2Cfuck&year_start=1700&year_end=2000&corpus=0&smoothing=3 http://ngrams.googlelabs.com/graph?content=suck%2Cfuck&y...