I am a new member in Freelancer, so I can not provide proof of my skills, but I can comment that for more than 10 years I`m working with databases helping several friends and family members with data entry projects.
The delivery time will depend on the amount of data to work with, and once started the project, I deliver my progress reports every two days, so that the customer is satisfied with my work and always handed the job by the deadline. If for some reason, I could not finish in time, I will notify the customer in advance.