Using Suffix Arrays to Compute Term Frequency and Document Frequency for All Substrings in a Corpus Mikio Yamamoto author Kenneth W Church author 2001 text journal article Computational Linguistics continuing MIT Press Cambridge, MA periodical academic journal yamamoto-church-2001-using 10.1162/089120101300346787 https://aclanthology.org/J01-1001/ 2001 27 1 1 30