English Language Wikipedia

 • John and James discussed at a great length when they met at the party. (non-standard) • John and James discussed at  great/some/ length when they met at the party. (standard) When people talk at great length, they talk for a very long time. 

 • Professor Yemi Akinkuotu, before his death, would go any length to make his students understand his course. (non-standard) • Professor Yemi Akinkuotu, before his death, would go to any lengths to make his students understand his course. (standard)