base = {"casa":0,"coche":0,"barco":0}

frase = "casa coche barco lalala :) :) lalala coche casa"

for word in frase.split():
    if word in base:
        base[word] += 1

print(base)

{'casa': 2, 'coche': 2, 'barco': 1}

from collections import OrderedDict

import re

base = OrderedDict({"casa":0,"coche":0,"barco":0})

frase = "casa coche? barco lalala :) :) lalala. coche. casa!!"

for word in re.findall(r'w+', frase):
    if word in base:
        base[word] += 1

for key, value in base.items():
    print(f"{key}: {value}")

casa: 2
coche: 2
barco: 1

import re
import OrderedDict

word_count = OrderedDict({"casa": 0, "coche": 0, "barco": 0})
words = re.compile('|'.join(word_count), re.IGNORECASE)

for word in words.finditer(texto):
    word_count[word.lower()] += 1