Correspondence (source) ; Dialektologie, historische; Dialectology, historical; Historical dialectology ; Sociolinguistics, historical; Soziolinguistik, historische; Historical sociolinguistics ; Sampling; Language corpus; Sprachkorpus; Datensammlung; Data collection; Textkorpus (method.) ; Text corpus (method.) ; Corpus linguistics ; CEEC ; Buchstabenhäufigkeit; Frequency (graphem.) ; Periods (historical linguistics) ; History of language (sociolinguistics) ; Alternation (Orthographie) ; Early Modern English