The Corpus of Contemporary American English (COCA) is a large, structured database that contains a wide range of texts from various genres, including spoken language, fiction, magazines, newspapers, and academic texts. It was created to provide researchers and linguists with a comprehensive resource for studying contemporary American English usage and trends. COCA includes over 1 billion words and is updated regularly to reflect changes in language over time. It allows users to search for specific words, phrases, and grammatical structures, making it a valuable tool for understanding language patterns and the evolution of American English in different contexts.