diff --git a/FirebaseCore/Internal/Sources/HeartbeatLogging/HeartbeatController.swift b/FirebaseCore/Internal/Sources/HeartbeatLogging/HeartbeatController.swift
index 20a021db4a1..7fa7c298053 100644
--- a/FirebaseCore/Internal/Sources/HeartbeatLogging/HeartbeatController.swift
+++ b/FirebaseCore/Internal/Sources/HeartbeatLogging/HeartbeatController.swift
@@ -22,7 +22,7 @@ public final class HeartbeatController {
   private let heartbeatsStorageCapacity: Int = 30
   /// Current date provider. It is used for testability.
   private let dateProvider: () -> Date
-  /// Used for standardizing dates for calendar-day comparision.
+  /// Used for standardizing dates for calendar-day comparison.
   static let dateStandardizer: (Date) -> (Date) = {
     var calendar = Calendar(identifier: .iso8601)
     calendar.locale = Locale(identifier: "en_US_POSIX")
diff --git a/FirebaseCore/Internal/Sources/HeartbeatLogging/HeartbeatsBundle.swift b/FirebaseCore/Internal/Sources/HeartbeatLogging/HeartbeatsBundle.swift
index 776dfb8ddbc..a6e258e8870 100644
--- a/FirebaseCore/Internal/Sources/HeartbeatLogging/HeartbeatsBundle.swift
+++ b/FirebaseCore/Internal/Sources/HeartbeatLogging/HeartbeatsBundle.swift
@@ -45,7 +45,7 @@ struct HeartbeatsBundle: Codable, HeartbeatsPayloadConvertible {
 
   /// Designated initializer.
   /// - Parameters:
-  ///   - capacity: The heartbeat capacity of the inititialized collection.
+  ///   - capacity: The heartbeat capacity of the initialized collection.
   ///   - cache: A cache of time periods mapping to dates. Defaults to using static `cacheProvider`.
   init(capacity: Int,
        cache: [TimePeriod: Date] = cacheProvider()) {
diff --git a/FirebaseCore/Internal/Sources/HeartbeatLogging/RingBuffer.swift b/FirebaseCore/Internal/Sources/HeartbeatLogging/RingBuffer.swift
index 6ba8c339733..7269c4dd803 100644
--- a/FirebaseCore/Internal/Sources/HeartbeatLogging/RingBuffer.swift
+++ b/FirebaseCore/Internal/Sources/HeartbeatLogging/RingBuffer.swift
@@ -16,7 +16,7 @@ import Foundation
 
 /// A generic circular queue structure.
 struct RingBuffer<Element>: Sequence {
-  /// An array of heartbeats treated as a circular queue and intialized with a fixed capacity.
+  /// An array of heartbeats treated as a circular queue and initialized with a fixed capacity.
   private var circularQueue: [Element?]
   /// The current "tail" and insert point for the `circularQueue`.
   private var tailIndex: Array<Element?>.Index
diff --git a/FirebaseCore/Internal/Tests/Unit/HeartbeatControllerTests.swift b/FirebaseCore/Internal/Tests/Unit/HeartbeatControllerTests.swift
index 37fd335235d..25bd02cfa70 100644
--- a/FirebaseCore/Internal/Tests/Unit/HeartbeatControllerTests.swift
+++ b/FirebaseCore/Internal/Tests/Unit/HeartbeatControllerTests.swift
@@ -191,7 +191,7 @@ class HeartbeatControllerTests: XCTestCase {
     let payload = heartbeatController.flush()
 
     // Then
-    // Note below how the date was intepreted as UTC - 2021-11-02.
+    // Note below how the date was interpreted as UTC - 2021-11-02.
     try HeartbeatLoggingTestUtils.assertEqualPayloadStrings(
       payload.headerValue(),
       """