| Period division The sections and sub-periods of The Helsinki Corpus The corpus is divided into three major time periods, each of which is further divided into four (OE and ME) or three (EModE) subdivision.  
                  
                    
                      | OLD ENGLISH | timeline | word count |  
                      | I | –850 | 2190 |  
                      | II | 850–950 | 92,050 |  
                      | III | 950–1050 | 251,630 |  
                      | IV | 1050–1150 | 67,380 |  
                      | MIDDLE ENGLISH | timeline | word count |  
                      | I | 1150–1250 | 113,010 |  
                      | II | 1250–1350 | 97,480 |  
                      | III | 1350–1420 | 184,230 |  
                      | IV | 1420–1500 | 213,850 |  
                      | EARLY MODERN ENGLISH | timeline | word count |  
                      | I | 1500–1570 | 190,160 |  
                      | II | 1570–1640 | 189,800 |  
                      | III | 1640–1710 | 171,040 |  Detailed information on each subcorpus With the publisher's kind permission, we include three chapters  from Rissanen, Matti - Merja Kytö - Minna Palander (1993), Early English in the computer age: explorations through the Helsinki Corpus. Berlin - New York: Mouton de Gruyter. Minor changes have been made to remove outdated statements.  Old English [Matti Kilpiö, Leena Kahlas-Tarkka and Aune Österman; adapted from Rissanen & al. 1993] Middle English [Irma Taavitsainen and Päivi Pahta; adapted from Rissanen & al. 1993] – with new introduction for web version by Irma Taavitsainen and Päivi Pahta  Early Modern English [Terttu Nevalainen and Helena Raumolin-Brunberg; adapted from Rissanen & al. 1993]  |