What is score years meaning?

Score years refers to a period of twenty years. This term was used in the famous speech given by Abraham Lincoln in 1863, known as the Gettysburg Address. Lincoln referred to the "four score and seven years" that had passed since the founding of the United States in 1776, meaning that it had been 87 years since that historic event.

Since then, the term "score years" has become somewhat archaic and is rarely used in modern English. However, it is sometimes seen in historical texts or literature as a way to refer to a period of time in a memorable or poetic way. For example, a writer might say "in the score years since the invention of the automobile" instead of "in the twenty decades since the invention of the automobile."