Corpus-based research draws scientific conclusions based on materials from existing corpora. Such research includes processes such as phraseological unit identification; statistical analysis; semantic and syntactic analysis. Corpus-based research allows us to analyze how phraseological units change over time and provides material for conducting diachronic research. Through this, the historical development and evolution of phraseological units are traced.

Types of work with corpuses are carried out in linguistic research through different approaches. Approaches such as corpus-driven (corpus-driven research); corpus-based (corpus-based research); corpus-illustrated (research that uses the corpus as an illustrative source) allow linguists to analyze data at different levels.