Answer:
Frederick Douglass spend three days washing in the creek because Mrs. Lucretia told him to do it.
Step-by-step explanation:
Douglass said that being so worried about his appearance was not his thing. If it were for him, he would not have spent so much time washing, but Mrs. Lucretia told him that “he musts get all the dead skin off his feet and knees before he could go to Baltimore” since the people there were very clean and they would laugh if they saw him dirty.