Monolingual corpora which are aligned with similar text segments (paragraphs, sentences, etc.) are used to build and test a wide range of natural language processing applications. The drawback wanting to use them is the lack of publicly available annotated corpora which obligates people to make one themselves. The annotation process is a time consuming and costly task. This paper describes a new corpus-based measure to significantly reduce the search space for a faster and easier manual annotation process for monolingual corpora. This measure can be used in making alignments on different types of text segments. The performance of this measure is evaluated on a manually annotated paragraph corpus, whose alignments are freely available, with promising results.