followcrom

fig, ax1 = plt.subplots(figsize=(12,6))

plt.title("Popularity / Release Density by Year", fontsize=12)
lin=sns.lineplot(x='year', y='popularity', data=raw_df, color='b', ax=ax1)
plt.xlabel('Year')
plt.ylabel('Popularity')

ax2 = ax1.twinx()

sns.kdeplot(raw_df.year, color='r', fill=True, ax=ax2)