Temporal studies have long been employed as tools to probe and investigate the physics in the inner regions of Active Galactic Nucleis (AGNs). PKS 1510-089 is a frequently studied Flat Spectrum Radio Quasar (FSRQ), often showing multi-wavelength quasi-simulataneous observations. We report on the optical and 𝛾-ray temporal analysis focused on major outburst events (flares) in 2014 – 2015. The 𝛾-ray flares are characterized by intra-day variability (IDV), with flux doubling times on the scale of hours. Optical/𝛾-ray 𝑧 - transformed Discrete Cross-Correlation Function (ZDCF) analysis revealed significant correlation (>95.45% C.L) between the low and high energy bands, found with near-zero time lags. We determined the minimum Doppler factors from each
flare and constrained the 𝛾-ray emission regions to distances close to the inner boundaries of the broadline-region (BLR) away from the central supermassive blackhole (SMBH).