diff --git a/da_detector.py b/da_detector.py
index 945f749..58ad4d0 100755
--- a/da_detector.py
+++ b/da_detector.py
@@ -9,6 +9,7 @@ class da_detector:
 	def __init__(self, langs_to_check: list = ["sk", "en"]):
 		# langs to check
 		# to be picked from ["cz", "sk", "de", "en", "fr"]
+		self.da_ngrams = []
 
 		if not isinstance(langs_to_check, list):
 			raise TypeError("not a list, bailing")
@@ -134,11 +135,13 @@ class da_detector:
 
 		probabs = []
 		try:
+			# only pick n-grams once per pass
+			self.da_ngrams = self.pick_ngrams(what_grams, how_many, txt)
 			for lang in langs:
 				probabs.append(
 					self.gimme_probabilities(
 						lang,
-						self.pick_ngrams(what_grams, how_many, txt)
+						self.da_ngrams
 					)
 				)
 		except Exception as e: