diff --git a/nmdc_ontology/report_instantiated_traids.py b/nmdc_ontology/report_instantiated_traids.py
index 5b6512e..1e1ea2f 100644
--- a/nmdc_ontology/report_instantiated_traids.py
+++ b/nmdc_ontology/report_instantiated_traids.py
@@ -57,7 +57,7 @@ def main(api_url, output_file, counts_output_file):
         counts_df = pd.DataFrame(value_counts.items(), columns=['Value', 'Count'])
 
         # Split the 'Value' column into two parts before and after the colon
-        counts_df[['Before Colon', 'After Colon']] = counts_df['Value'].str.split(':', n=1, expand=True)
+        counts_df[['ontology', 'local_id']] = counts_df['Value'].str.split(':', n=1, expand=True)
 
         # Save counts DataFrame to a TSV file
         counts_df.to_csv(counts_output_file, sep="\t", index=False)
diff --git a/triad_term_counts.tsv b/triad_term_counts.tsv
index b49a4b1..08a965e 100644
--- a/triad_term_counts.tsv
+++ b/triad_term_counts.tsv
@@ -1,4 +1,4 @@
-Value	Count	Before Colon	After Colon
+Value	Count	ontology	local_id
 ENVO:01000253	1040	ENVO	01000253
 ENVO:01000621	17	ENVO	01000621
 ENVO:01000017	52	ENVO	01000017