LDV; Linguistic data processing ; Sampling; Language corpus; Sprachkorpus; Datensammlung; Data collection; Textkorpus (method.) ; Text corpus (method.) ; Corpus linguistics ; Validity (method.) ; Evaluation criterion (method.) ; Techniques (in research) ; Research techniques ; Kommunikationstechnologie; Informationstechnologie; Information technology; Informationstechnik; ICT; Communication technology ; Second language acquisition (psycholing.) ; English