def topicoccurence(top,rev): rev = rev.split(" ") dic = {} count = 0 for k,v in top.items(): if k == "Price" or k == "Business" or k == "Harry": for i in range(len(v)): for j in range(len(rev)): if v[i] == rev[j]: count+=1 dic[k]=count count=0 return dic topics={"Price":["cheap","expensive","price"],"Business":["gnome","gnomes"],"Harry":["harry"]} rev = "Harry shurb did Harry cheap price price harry of the gnome gnomes" x = topicoccurence(topics,rev) print(x)