[fguerraz]

However, the author managed to squeeze the word "however" eleven times in this article, however.

[dahart]

Never twice in one sentence like you did, and there are 13 “but”s. Is something wrong with using ‘however’? If so, what exactly?

[flimflamm]

However, there was only 57 however's in the paper it self.

[paulnpace]

> A new paper provides a major step in that direction, however.

It may have gone unnoticed if used only used once in the article, however.