Sampling; Language corpus; Sprachkorpus; Datensammlung; Data collection; Textkorpus (method.) ; Text corpus (method.) ; Corpus linguistics ; Deutsch Diachron Digital ; Frequency (morph.) ; Needs assessment (method.) ; Strukturgleichungsmodell; Structural equation modeling; Mixed methods research; Q-matrix (methodol.) ; Fusion model (methodol.) ; Regression analysis; Regressionsanalyse; Factor analysis ; Techniques (in research) ; Research techniques ; Areallinguistik; Geolinguistik; Geolinguistics; Linguistic geography ; Sprachwandel (morph.) ; Language change (morph.) ; Morphological change ; Kanzleisprache; Chirograph; Bulle (Urkunde) ; Historical documents (language) ; Mundartforschung; Dialectology ; Literary language ; Lyrik (Sprache) ; Poetic language ; Lemmata ; Concrete word; Imageability (psycholing.) ; Konkretum; Abstract word/concrete word ; Ableitung (morph.) ; Rule (word formation) ; Early Modern High German ; Old East Middle German ; Old Middle Franconian ; Old Rhenish Franconian ; Middle High German ; Mittelalemannisch; Middle Alemannic; Old Alemannic ; Old Bavarian ; Old East Franconian