update configs

README.md

@@ -12,6 +12,13 @@ configs:
     path: 100M/train-*
   - split: validation
     path: 100M/validation-*
+- config_name: cost_to_carry_frequency
+  default: true
+  data_files:
+  - split: train
+    path: cost_to_carry_frequency/train-*
+  - split: validation
+    path: cost_to_carry_frequency/validation-*
 language:
 - en
 ---