When combined, 常见 (chángjiàn) literally translates to “often see,” which perfectly and logically captures its meaning of being common or frequently encountered.
You wouldn't say someone is a 常见 person; you would say they are a 普通人 (pǔtōng rén - an ordinary person). This focus on objective frequency over subjective quality makes 常见 a straightforward and indispensable word for learners.