Freelance and part-time work should certainly be included in your work history, as they can showcase a range of skills and experiences valuable in a Data Analyst role. When listing these positions, focus on the data-related aspects of the work. For example, if you worked on a freelance project involving data modeling or predictive analysis, detail the project, your role, the tools you used, and any significant outcomes or insights derived from your analysis. This information will provide potential employers with a clearer understanding of your practical skills and versatility as a Data Analyst.