Pulsations and oscillations are a common feature of solar flare emission, and are often observed simultaneously over a wide range of wavelengths (radio, EUV, and X-ray) and time scales (seconds to minutes). They are typically identified in X-ray and radio observations from instruments such as RHESSI and Nobeyama. To date, the characteristics and causes of these phenomena remain the subject of much debate. We have therefore developed a number of techniques to characterise these pulsations in a large sample of flares, taking into consideration the power law power spectrum of the flare time series. Furthermore, we have also performed a multi-instrument study to search for correlations of these pulsations across different energies using GOES, PROBA2/LYRA, SDO/ESP, and RHESSI. These observations give us an insight into the characteristics of quasi-periodic pulsations across a range of temperatures and may provide a way of understanding the nature of flaring plasmas.