Two and a half weeks (Lena)
They had been working non-stop for two and a half weeks on the project and had made considerable progress. The notes Erskine's granddaughter had found were valuable and had helped them make the progress they had. Tim mused that if they had these notes decades ago they would have recreated the Super Soldier serum long before now.

Tim had been working for the past thirty six hours and needed a break. Maybe a quick nap and some caffeine. They would do the trick.