diff --git a/data_wrangling/commons/wav_times.py b/data_wrangling/commons/wav_times.py
new file mode 100644
index 0000000..6ebe74c
--- /dev/null
+++ b/data_wrangling/commons/wav_times.py
@@ -0,0 +1,38 @@
+import datetime
+import subprocess
+
+def wav_times():
+    """Use subprocess and `afinfo` to get times from a './data/' folder with .wav files
+
+    return
+    ------
+    wav_seconds: float
+        Sum of seconds of all interviews in folder
+    n_wavs: int
+        Number of processed wav files
+    """
+    grep_results = subprocess.run(f'for f in {directory}*.wav; do afinfo $f | grep "estimated duration" | grep -Eo "[0-9]+\.[0-9]+" ; done', shell=True, check=True, capture_output=True)
+    time_strings = grep_results.stdout.decode().split('\n')
+
+    wav_seconds = 0
+    n_wavs = 0
+    for i_time in time_strings:
+        try:
+            wav_seconds += float(i_time)
+        except:
+            continue
+        else:
+            n_wavs += 1
+
+    return wav_seconds, n_wavs
+
+def secs_to_hms(total_seconds:float):
+    return str(datetime.timedelta(seconds=total_seconds))
+
+if __name__ == __main__:
+    directory = './data/'
+    interview_seconds, n_ints = def wav_times()
+    print(f"The total time is: {secs_to_hms(interview_seconds)}")
+    print(f"The total time in seconds is: {interview_seconds}")
+    print(f"The average interview duration is: {secs_to_hms(interview_seconds/n_ints)}")
+